Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f02afa627ad49ce…

MALICIOUS

PDF

76.7 KB Created: 2021-03-01 13:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c65131b2449f0343f400eddc146030f SHA-1: 57455c5d0666c637fee3889f34472025a07256e0 SHA-256: 6f02afa627ad49cef99ff1fbd51e4dd92a20bc684bfb4d153ce87f1433e1da0e
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one specifically linked to troubleshooting an 'Ionic pro air purifier'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further compromise.

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://mezovuduw.ru/123?utm_term=ionic+pro+air+purifier+troubleshooting PDF link annotation
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/42827b63c7291d.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/njdot_pay_item_catalog.pdfIn PDF document text
    • https://savaxibinis.weebly.com/uploads/1/3/3/9/133997587/4863611.pdfIn PDF document text
    • http://yblda.fun/9980598487lvmxx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459319/normal_5febb3c47581a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449183/normal_5ffe9cd0689d7.pdfIn PDF document text
    • http://strgb2.ru/sto_perigiali_lyrics_englishcbvii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_6034d2a0397f3.pdfIn PDF document text
    • https://gotedajasokidu.weebly.com/uploads/1/3/1/4/131407980/e2738a.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/6ljghhH/car_parking_multiplayer_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_600d290db3c90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://regovud.epizy.com/vasetunikopugoseb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 5236 bytes
SHA-256: 74b30f19d807073cb013a2540ff9ea16dc3682881259d50db962b7852bab40bb
font_01_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10872 bytes
SHA-256: eb4b7b6d0f87bfd9e76f973c1ef6056083955e0529a006f2be0f1f03d850e0f3
font_02_sfnt_off00011801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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