Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d2c405b74a3875…

MALICIOUS

PDF

89.7 KB Created: 2021-06-11 02:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e2ba746b0fc786837eae9d00f869afcb SHA-1: 18d8866765cf72835e7512bce0728d621267a1c8 SHA-256: f9d2c405b74a387535c13d80f8d82169e62d90984abf426b57d4946ba6a3ad0c
186 Risk Score

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://chcial.ru/pbw?utm_term=commandos+2+apk+download PDF link annotation
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/5627915.pdfIn PDF document text
    • https://luxisawevevolal.weebly.com/uploads/1/3/2/6/132682936/gazibodupa_sezifab_ladekez.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/napos.pdfIn PDF document text
    • https://tuxenovizomojow.weebly.com/uploads/1/3/7/5/137516496/tariretuj_xodigikibib.pdfIn PDF document text
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/vifagevide.pdfIn PDF document text
    • https://pikemane.weebly.com/uploads/1/3/4/7/134775920/9c9aa06ab4f2981.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/faxejuripi.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/a64aa714-062f-444c-b9bc-780d1278713f/when_you_make_mistakes_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97f9b83-c6d0-4506-ad52-b869d056580c/wajupadovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8088276-3363-40e0-8248-2794e5b097af/kolumijoguvabamusisevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f5007f-c282-49ea-95df-054fc7a40894/how_to_change_my_name_on_ontario_health_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042fbb60-4776-4c66-a62c-56b8967b2250/70971174600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cdb12c-edc7-49e8-afaa-87c2d74e8199/the_power_of_love_frankie_goes_to_hollywood_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9f052d-c7c0-4bcd-81ca-d56c3ad53cd3/51899299191.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144420828/planeta_dos_macacos_o_confronto_assistir_online.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/dadex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6356ca8f-bb92-41ec-ac9c-caaf96748bc2/a_canticle_for_leibowitz_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60990831-4bc9-46ab-b14f-270eef38f008/surubesuzubogodirikunofi.pdfIn PDF document text
    • http://bijinim.pbworks.com/f/dementium_2_ds_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8946ca3e-2aed-4f14-91f9-a8377bef5361/dodezesironej.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/download_xhubs_apk.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFF 5204 bytes
SHA-256: d23ed182603af4b24516c417b159ada9c8efb7b9bcb4522a70c8f2f59df775bc
font_01_sfnt_off000130b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B3 12440 bytes
SHA-256: 483895452d73f27b0f92cc7b6c6bfac70826ea315752e34b02953eb1e29e1f7d