Malicious PDF — malware analysis report

Static analysis result for SHA-256 e172521babc242ca…

MALICIOUS

PDF

77.2 KB Created: 2020-12-20 21:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c20047260717fa07e6f0530c0bcdd719 SHA-1: d7279c33a34a5ddf375e1b13b6232b1027305352 SHA-256: e172521babc242ca46b4ad2f6641a8c00caae711d3acd5e212badf7e5e723fb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://traffnew.ru/strik?utm_term=washington+county+poison+control PDF link annotation
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/6368113.pdfIn PDF document text
    • https://zabugusu.weebly.com/uploads/1/3/4/3/134311035/jilebus_juxikuk_fedawonitesuwav.pdfIn PDF document text
    • https://panatomovedo.weebly.com/uploads/1/3/4/6/134688712/66d88ec6088512.pdfIn PDF document text
    • https://vudiwajexisipu.weebly.com/uploads/1/3/4/0/134096418/mogemenubepabi-mozamidumebejo.pdfIn PDF document text
    • https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/918a04f430ccf0.pdfIn PDF document text
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/zalig-letirufanin-ximidufekefa-veluxemuro.pdfIn PDF document text
    • https://roresino.weebly.com/uploads/1/3/4/3/134364893/zibotobiv.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/2844c706-e922-4528-a428-cbe60e260e58/68747154184.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/algebra_with_pizzazz_answer_key_page_202.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/simple_appointment_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/unicidad_de_dios.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/google_chrome_installer_standalone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3823dde1-65d0-40b3-93d8-3b7eb37e4cf9/17718578615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d007740-ba24-46ad-850b-d522a9ad64c9/reputation_in_the_crucible_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d63d19e-ba99-4959-90d9-ff1a5525b202/40250573068.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55adea13a450bab12175e/t/5fce73b7af793577f83a9b91/1607365560352/feeling_recharged_quotes.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_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 5308 bytes
SHA-256: 631cd8a4b38436e1b025248ae8e9834a3e6dccec6c82afd03670723f8d547dd6
font_01_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 11876 bytes
SHA-256: 826140d6f720b0b9432d73ffc5cee42497e43ac13d53bdf11e403a2e178cd91b