Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2909995938ee547…

MALICIOUS

PDF

58.3 KB Created: 2020-12-06 19:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0bfd0c5b61d91506c8f3c2857ffbbe87 SHA-1: 9bd5bc1dcac4f62f2107fc134e1ea303770bb6ff SHA-256: d2909995938ee5476de6104efb8ea3999a94a232964c4b2c38c3a60ff3c5f593
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://trafficel.ru/strik?utm_term=folgers+coffee+jingle+lyrics PDF link annotation
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/vivaterugofopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5f8e5ac9e77af.pdfIn PDF document text
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/1eea0718001f618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9232d90391c.pdfIn PDF document text
    • https://gazuxajolitivik.weebly.com/uploads/1/3/4/7/134770387/podetoxubet_jepawapo_tusanafa_xalubur.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/9896739.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/piniwazikududi.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/varete.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/misofazek-melil-vonikejo.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/fabc9b71-5cfd-4ddd-b855-94a27c1d7151/wumalavuti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fc96cd973e24d697d28905d/1607036122377/best_drag_racing_rc_car.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/vugilef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fc8d3cbd6e0cc37e34615a9/1606996939664/she_wants_me_dead_roblox_id.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_off0000aad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD9 4972 bytes
SHA-256: e921ae1ac80f65a909cfae79a3f8e18ad23e5db521553af9faa7ac48eed93c69
font_01_sfnt_off0000bbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF1 9572 bytes
SHA-256: 111b1a801a863634af679914f6ce0cebfab5406a4dbad9bf2dda415946cbe905

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