Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab49e73ceab6375c…

MALICIOUS

PDF

81.0 KB Created: 2021-03-17 11:38:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8dd3b5b7cdcbbe7ef4a2212a763459b SHA-1: 83efec2d0a541587224ad6f65aad1a6637ba02ca SHA-256: ab49e73ceab6375c8800ec1bdb47e8219df0448f89c3e416da97951c2d624013
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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/wix?keyword=civ+6+warmonger PDF link annotation
    • http://idealica-italiauficiale.website/cambridge_checkpoint_science_9lv2er.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/gchbqjc/identity_verification_venmo_not_working.pdfIn PDF document text
    • http://pumba-timon.space/what_is_the_setting_of_the_little_princeegkb8.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/ZX9jhgd/dexorozemunafif.pdfIn PDF document text
    • http://shoop-fp.ru/capsaicina_uso_internosfedk.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/idgjheA/9689796796.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/gicolji/calm_down_angry_neighbor_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/HvgihdI/treatment_guidelines_for_pulmonary_arterial_hypertension.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxazutiri/bG7xjaw/fudosusesefonugidizifo.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewaku/jf0ZzZn/generating_sequences_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/IYPKhgD/draw_a_stickman_sketchbook_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/igMYjfi/renegade_racing_game_mod_apk.pdfIn PDF document text
    • http://vamekujo.66ghz.com/ridibed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapavakagazu.epizy.com/wibevuzirinokevilexomeli.pdfIn PDF document text
    • http://jasebusezazov.rf.gd/apache_tomcat_8_installer.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_1f7dc59435f5475e998f6e791afe1192.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0187b069-fced-4df1-95b7-50302ba90f38/how_many_pages_minimum_for_a_book.pdfIn PDF document text
    • http://satanomoxa.rf.gd/minecraft_1._8_free_pc_windows_7.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_4624fb09d4bc464f9be7a78df39f8ba8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ecbe71-e84d-476e-88aa-dd1f2b4a0296/fejudivejesanujo.pdfIn PDF document text
    • http://mivoxonewume.rf.gd/25086358909.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_ee873b06791a48878ca92a243e6f9ebb.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 5008 bytes
SHA-256: f447bf17ee17ece44540625acb75a743e6fd60be46e2e03b4c1c7435169e2359
font_01_sfnt_off00011150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11150 11036 bytes
SHA-256: 200d17860a5263ee7a7288a9cbf95138e27999fbe2660d14b016fae5446a6246

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