Malicious PDF — malware analysis report

Static analysis result for SHA-256 64345d5cb75a2031…

MALICIOUS

PDF

73.4 KB Created: 2021-03-24 11:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d9f978a380df5c19d75f9770834ba91 SHA-1: 9ffb61ad895a38340fbf6a2b0d59b3874e9d4008 SHA-256: 64345d5cb75a2031c60779c61b6e9f2973d862bd71d9deb178b37370e6877be0
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 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=what+kind+of+battery+does+a+2012+dodge+avenger+take PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fdc48f36eaf8.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/who_plays_jack_reacher_on_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/jjghb64/29109109328.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/chaAhiy/numepab.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/WjeXkje/gugawabemodubo.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/timosagotiviwadodiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5fe28d4cb7b0c.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/dukopemorivugikidez.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/TLsTjbr/used_super_shot_basketball_arcade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/bheghie/diablo_3_season_22_start_date.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/progressive_tense_exercises_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6043e131eb2d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fdd3591f3359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_a0b7e7d5c2874a328ddbd4b70b3e13e7.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_038d45c7c3ae4f92bfc9709b03be9cd2.pdf?index=trueIn PDF document text
    • http://tarobajasupimi.epizy.com/pinigerasewi.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_6e3037910fde4a3985cc2ed1d37e9390.pdf?index=trueIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_965654c60d4a406b9b75caaedaa88d20.pdf?index=trueIn PDF document text
    • http://kunitugi.rf.gd/satumaxadefu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 5844 bytes
SHA-256: 14405247c974ceef30cdca4890a51b33385164ece5eaec1a1050228ad7cb6e80
font_01_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 11236 bytes
SHA-256: eb36b250837dade93ce9fbfbd14b5a3b07d4b00d02a64ec18b833d764e77bad3

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