Malicious PDF — malware analysis report

Static analysis result for SHA-256 9372a5a957c4c947…

MALICIOUS

PDF

76.5 KB Created: 2021-02-13 19:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 117dcafbca6468ca0d397ab735ad9e89 SHA-1: 9293aedf4553be33071b6cc233b32991c1fae6e4 SHA-256: 9372a5a957c4c947a6d82919c1a2cfd0c381367ec38965ad379d30a579683854
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-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://crophysi.ru/123?utm_term=dq+xi+casino+guide PDF link annotation
    • http://rollernefritmassage.xyz/mksap_cardiology6zay4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448727/normal_60051e74c6231.pdfIn PDF document text
    • https://tuxemadoja.weebly.com/uploads/1/3/2/7/132712185/kemefi.pdfIn PDF document text
    • http://peludofnor.fun/pac-_mantm_championship_edition_2_online726f5.pdfIn PDF document text
    • http://gufutaca3.xyz/comparative_adjectives_worksheet065zk.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/bf48099292.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/sidonixovagudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_600388f221f92.pdfIn PDF document text
    • http://ehaberdevlet.com/melbits_world_playlinki0r9t.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/tejenil_pakedeturef.pdfIn PDF document text
    • http://alex-travel.moscow/anabaptist_vs_reformedfolvt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_6025771b2410a.pdfIn PDF document text
    • https://fixajunize.weebly.com/uploads/1/3/6/0/136051507/9513544.pdfIn PDF document text
    • http://ellmax-site.xyz/pigutedutx4rtv.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/ferozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_60041e16c064a.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/jetivasojotapazuruti.pdfIn PDF document text
    • http://ulekschool.online/john_cage_dream_piano_sheet_music22qts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvipifipu.rf.gd/78354113531.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_off0000f074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 5172 bytes
SHA-256: 91ad06d06d7465858a80c25dcdee60c0b1fad4cc0287975a8a11f9618ddf1a07
font_01_sfnt_off00010223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 10360 bytes
SHA-256: c9f40277c13e91dabe1855cb96fb33191af873e2d867059cd2b0e136a07c66e1

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