Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a0e43f6ec9b31e…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 00:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 62e7ba8fe9cf0948bc9a5cab8a8d0537 SHA-1: b208e3e4595431df06e1738f47ef0139ed519d42 SHA-256: 95a0e43f6ec9b31ea7edf80d26d17bde1a216db6ae9086e3fff8f66860487b21
186 Risk Score

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 0.9997

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://druttle.ru/123?utm_term=cisco+packet+tracer+6.+2+free++softonic PDF link annotation
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/mejakoxukiv.pdfIn PDF document text
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/nufutafosixutafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_603bfc7f2463a.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/be22c8e.pdfIn PDF document text
    • https://jabukosiw.weebly.com/uploads/1/3/0/8/130874379/5063840.pdfIn PDF document text
    • http://mx50off.pro/50325014410a6m8r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_602e2c1d4be86.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/ViitcEQ/93790748580.pdfIn PDF document text
    • http://durofuvixari.22web.org/a_b_whole_square_all_formula.pdfIn PDF document text
    • https://doluduzugemuj.weebly.com/uploads/1/3/1/4/131411539/sanumawajabujix.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/fgsjhhc/fabedidepunuwelabit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fce2ab389725.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/et4wgf7/brain_balance_norwalk_ct_reviews.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/zinatipuvdx0b.pdfIn PDF document text
    • http://topcabinets.xyz/vojaxigap92uw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_5fdae0556bdb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5fca33fa121eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonozixugixapap.epizy.com/battlefield_bad_company_2_mod_apk_revdl.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_61d9859a5c46446aabdf3f533bc447ff.pdf?index=trueIn PDF document text
    • https://d2d110b1-dce0-4b0c-bed7-be24280b7a6e.filesusr.com/ugd/165585_a2de59fa7e634f1fba18cb9c79ff0a6b.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_bf3a85b34f17419cac9f2bdf5802fa7b.pdf?index=trueIn 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_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 5264 bytes
SHA-256: cb8f58f3d3551396e589073ff85aa72302ad0cab3baf6f347ccb551f7583558e
font_01_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 10920 bytes
SHA-256: cb67502fccb2359a2ca160711c33ce2ed051f17510c55387c977c8cb120ca56b