Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe73951b7d1805e8…

MALICIOUS

PDF

66.5 KB Created: 2021-03-20 18:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5523e2d51c304017636f68572e270f7c SHA-1: f6892e420a5ccff3af212aa0a4d1007d6d242374 SHA-256: fe73951b7d1805e84bd638a57ef4ed8384bc22ca57a21b363b5904ee74a28db1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into downloading further malicious content, likely exploiting the user's interest in the '2013 ktm 65 owner's manual' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jacksth.ru/aws?utm_term=2013+ktm+65+owner%2527s+manual PDF link annotation
    • http://cookwellbakewell.com/bagidobaxunazikamer86re3.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/73216308276.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/nugevej.pdfIn PDF document text
    • http://fullstacket.online/zigutokinexopupunuuop0.pdfIn PDF document text
    • http://alerma.ru/new_carnival_games_wii_secretsjendz.pdfIn PDF document text
    • http://premiumpornclips.com/debugadupuxhpn1.pdfIn PDF document text
    • http://yogait.space/rev_heads_rally_mod_apk_rexdls68d0.pdfIn PDF document text
    • http://topsalon.xyz/what_uniform_do_navy_seals_wearotcbq.pdfIn PDF document text
    • http://detonic-deutschland.website/zezerumubulz5p51.pdfIn PDF document text
    • http://topcreditmonitoring.info/remember_the_titans_video_worksheet_answersmskqh.pdfIn PDF document text
    • http://livecopyrightverification.com/61695303268a1ruv.pdfIn PDF document text
    • http://subfamjtii.site/47022517204tdkzh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasazaxara.rf.gd/wekanafu.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/49891676592.pdfIn PDF document text
    • http://legipugubawaw.epizy.com/18157399827.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/how_to_replace_a_grundfos_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/sububujukimer.pdfIn PDF document text
    • http://tikoperuzotot.rf.gd/adverb_of_manner_worksheet_grade_3.pdfIn PDF document text
    • http://xerivigop.rf.gd/toxicity_bass_tab.pdfIn PDF document text
    • http://pinixivula.epizy.com/2010_chevy_impala_lt_manual.pdfIn PDF document text
    • http://livirava.atwebpages.com/war_of_the_worlds_movie_alien_sound.pdfIn PDF document text
    • http://titugol.atwebpages.com/ruger_p95_9mm_review.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_off0000c88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88D 5692 bytes
SHA-256: dba76b888e0b201bf6028dd1bb8d666618f3932ff1a999a0be63ed86cdc75907
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 9528 bytes
SHA-256: e8cca57ea8672118d81cdccd1fbddcbc74729a1c950e09376b75bd6fe74482f7

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