Malicious PDF — malware analysis report

Static analysis result for SHA-256 90621ad4d627b8e3…

MALICIOUS

PDF

132.0 KB Created: 2021-05-28 12:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7bb8659a3d0193757e30e5db8a93f43 SHA-1: 214509dc3ebe7cd71061ccdc4320114aacc197de SHA-256: 90621ad4d627b8e3594b21b4ca3b245c9a5820533670fe4a577c698be09bdfa6
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm designed to redirect users to various SEO-optimized PDF files, likely as a lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the ultimate goal is to trick users into downloading a password-protected archive, a common tactic to bypass security scanning. The presence of external URIs and a high ML classifier score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=preset+transition+adobe+premiere+pro+cc+2015+tutorial+pdf PDF link annotation
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/wapunajazub_sudizel_pasurupizudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_603b1993448e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5fc5e95c01ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492574/normal_600a557e252f5.pdfIn PDF document text
    • https://pobowapikojuga.weebly.com/uploads/1/3/4/9/134903403/gifuzava.pdfIn PDF document text
    • https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/xokekeviliwaxej.pdfIn PDF document text
    • https://mipejefote.weebly.com/uploads/1/3/4/3/134356111/6054570.pdfIn PDF document text
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/671940656b98fd.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/kijenezupirafer-gudezani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_5fdaed3fcfe58.pdfIn PDF document text
    • https://dawikuwavuvuka.weebly.com/uploads/1/3/4/8/134866752/e4c672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_600a2497c4301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f7a365-809f-4cb6-8c98-e9f9b8ea6328/is_newsmax_on_dish_satellite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b11de3-ea3a-4154-bc0c-4c39d5ea578d/mashed_potatoes_from_scratch_without_milk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4558902-80fc-4e13-a2dd-99b8dd6ed65a/napojapopuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2363f480-ac53-41e3-8131-6732d20a41cf/galaxy_attack_alien_shooter_mod_apk_free_shopping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee27cc6-e087-43ea-8afd-3d9e2026dde0/vishnu_sahasranamam_1000_names_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a32324-0753-467b-bcc3-6596142979d2/evaluacion_lengua_6_primaria_santillana_saber_hacer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7203104c-6518-4aad-b81a-c464816813a4/55178303981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751471bc-0033-4405-85a2-0a8fc2f7a714/53582625222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586eaa9f-f814-4674-8abe-14bf55dd6120/pubuvoxomijedopaxudoful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b7968e-e31f-4d93-aa2e-b5fe334cb7fa/how_to_clean_a_rheem_hot_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763fabbc-3303-450b-a385-0f2935b0f45a/how_to_apply_pf_form_15g_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a61c09-ad88-41ac-ade0-7f270da57476/que_son_fichas_bibliograficas_y_ejemplos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C4B 7140 bytes
SHA-256: 7e908d9bee064bcd87c6f9957f79cae47cbf143189249f0979fd428c073fff96
font_01_sfnt_off00016eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB4 5892 bytes
SHA-256: b4afd9f1792bbe82248565bd6dc666b202166152f03a83ac43d6bd3934b795e6
font_02_sfnt_off000182a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182A8 16268 bytes
SHA-256: d9ab2e7e086164531d43cc0ffe7908ba4039df26ae525ff5d2b1394ecd0007b7
font_03_sfnt_off0001b086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B086 13012 bytes
SHA-256: 49a6001694519f01a21b183f19d2f9a5bedd21bef80ea8b3288a736266c9aa9c
font_04_sfnt_off0001dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCBE 19208 bytes
SHA-256: dd3b1d44c42e83452aee16fd09c32a82d01a9974c662ad68fb662b45dcf9f2f7
font_05_sfnt_off0001f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F91A 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

Open this report in the interactive analyzer, or submit your own file for analysis.