Malicious PDF — malware analysis report

Static analysis result for SHA-256 79330a57e35dd1aa…

MALICIOUS

PDF

66.3 KB Created: 2020-12-03 17:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 21b30871ae0fd08ff21728bdf264cb15 SHA-1: ee2ea1b7684a119a2bcba56c5aa66889ced1ecd3 SHA-256: 79330a57e35dd1aaeed29339d31beefe1f89fbe47bdf948989fe21e14206d67c
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing campaign, leveraging a fake income tax portal lure to encourage users to click on embedded links. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with one prominent link pointing to 'trafffe.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/aws?utm_term=income+tax+e+filing+reporting+portal PDF link annotation
    • https://wogivanozo.weebly.com/uploads/1/3/4/5/134586267/9a9e71036296ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8a1c53da453.pdfIn PDF document text
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/wovesuvulunon-molepiz-vobove.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/xorelupu-wubales-wezafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8abd1691f41.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/b74e63b0d243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fbbdd67d2df5.pdfIn PDF document text
    • https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/ferekigavesel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc166e5ab79f442f22d24ec/t/5fc541bff3de5e49b5115add/1606762947377/87732609373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ec0573-6849-45ee-9276-6bf5df0e03b5/90394417075.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc6052461e25426e106a8c2/1606812965515/dragon_ball_z_frieza_saga_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1479fe59-d466-4015-b2ba-7aea62f6c71f/48031099563.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/free_wine_bottle_mockup_template.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/sqlite_manager_0._8._1_free.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_off0000c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 5160 bytes
SHA-256: 1e5dec77cd4eb19b49d7be0b47bbdf4955d480dfd11968d5f9dc139b10a3a927
font_01_sfnt_off0000d934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 10416 bytes
SHA-256: 0de7432fb6846b411e4e4993ee52fb2ad326dd01aea5f376a466c45055cfb15e

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