Malicious PDF — malware analysis report

Static analysis result for SHA-256 01afa6daad220ffa…

MALICIOUS

PDF

80.2 KB Created: 2021-05-08 04:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 18b85ea45e573fb05ddfe8b0440bdf26 SHA-1: 948e50714fc99a4368077377fa4247b52cdb2a5b SHA-256: 01afa6daad220ffa3aa5d8f7d10e599a51362a5ca73cf8949dfa34547d15e3b4
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external links, many of which point to disposable hosting services. The presence of a "download" button lure suggests an attempt to trick users into clicking these links, which likely lead to further malicious content or phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=what+is+my+local+post+office+number PDF link annotation
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/88f7f3868.pdfIn PDF document text
    • http://sodahq.pro/acculturation_scalehe05n.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/3299888.pdfIn PDF document text
    • http://titanovyi-filtr.ru/256731446083q69w.pdfIn PDF document text
    • https://lekipavovat.weebly.com/uploads/1/3/4/3/134332936/580c5.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/zenuziwaperonejofo.pdfIn PDF document text
    • https://dogewirezuv.weebly.com/uploads/1/3/4/6/134699505/lonazeg-lafujapulojobuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5ff036a84ce91.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/4294943.pdfIn PDF document text
    • https://lixijuzi.weebly.com/uploads/1/3/4/6/134626773/mutizati_tirezobaroti_guzexikasewag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_600aa388b8a26.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/af383b2d90250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_605467c7daecf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/gesakimudegubazonikuxoma.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_c5d22d4a05a545eb8b2766e7bcb01c2e.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_12f1dee5e9374df48e37cd76d21269d4.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_398ff9404a9b4931ad32a80613bcfc0f.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_5ed9975b904e4978ab941ec8237ad3b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/hp_laserjet_4050_driver_windows_10_64_bit.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_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 5508 bytes
SHA-256: e6f903e927f16db826ea698658f46e5d1f2b4a4bb468f44f501695838c82e4b0
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 11024 bytes
SHA-256: b4d63d57e6c2270b4e79a0d8b5688e55233a411f435439ab94dda9ad4ee1bef1