Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f98b87e25a97fe3…

MALICIOUS

PDF

73.1 KB Created: 2021-02-14 23:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9d11677236c3eff50ea990fb7647eff5 SHA-1: aba7ff674460fc40e01750d3a8034b3995f2e674 SHA-256: 2f98b87e25a97fe30cb02ca0848433288485ff58991aaf593f028a7a85b37361
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 0.9997

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://leonvi.ru/wix?keyword=onn+hd+outdoor+antenna+instructions PDF link annotation
    • https://cdn.sqhk.co/boxumiza/Wj0iaya/radiation_island_mod_apk_free_craft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5fdecda04535e.pdfIn PDF document text
    • http://itwow.info/puwirevusolilogexopi7so7x.pdfIn PDF document text
    • http://freehookup.xyz/binozavav2lol2.pdfIn PDF document text
    • http://marketitaly.info/microsoft_publisher_birthday_card_templates_freefy01z.pdfIn PDF document text
    • http://detonic-buy.website/amu_online_form_20207xfpl.pdfIn PDF document text
    • http://leadtop.co/audacity_2.2.2_manual_download3pf3f.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/giJCBSK/plague_inc._evolved_apk.pdfIn PDF document text
    • http://liketime.fun/nawijusuxodanezixelufxz411.pdfIn PDF document text
    • http://losqutoq.online/curse_of_strahd_level_guideo7asp.pdfIn PDF document text
    • http://love-cosmetics.shop/gotegipaapn0j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_600ca86bf2f4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5ff3e9dd57f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_60134b2aefc8c.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/iiukjjb/guwodekewewatutetowiguwis.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/cJ8Xifm/92124578812.pdfIn PDF document text
    • http://ecoterritory.store/66450977684efown.pdfIn PDF document text
    • http://deflecfcvy.best/42837156637prvt9.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/leteraxewe/vobepasaxipevadajin.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/metigab.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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 5024 bytes
SHA-256: e5954b0a609460e316a160e4ba033c0965adccc1f86c303ed4358199239665b9
font_01_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 10564 bytes
SHA-256: 3ab2c7ffdbb4566027cb91906ba0ea5b438ea0b838c77526c508b76809b31096