Malicious PDF — malware analysis report

Static analysis result for SHA-256 7493b862e1f3e8e3…

MALICIOUS

PDF

69.8 KB Created: 2021-01-27 10:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9a7c1800718f6134b1d61c14f0488d73 SHA-1: 9a70c454606b3ce1429187f2d2f5081db82ffa04 SHA-256: 7493b862e1f3e8e36842f27063858b2ffb6500b9ce6387cee455615ddd1240b1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF is flagged as malicious by ML classifiers and ClamAV, and contains numerous external URIs pointing to disposable hosting. The document body, though heavily obfuscated, suggests a lure related to owner's manuals. The presence of multiple links to PDFs on suspicious domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=chevy+cobalt+06+ls+owners+manual PDF link annotation
    • http://lozhobelir.space/natofblnz9.pdfIn PDF document text
    • http://teaitalis.space/avengers_theme_song_piano_notes6sxzh.pdfIn PDF document text
    • http://instapriz365.online/aprilia_srv_850_owners_manualn9flz.pdfIn PDF document text
    • http://homiak.fun/toximosuvadoxufoxaperopa21dhg.pdfIn PDF document text
    • http://ryukzak.digital/usa_18_wheeler_truck_drivertxdht.pdfIn PDF document text
    • http://logvoz.ru/12115831402fpw1y.pdfIn PDF document text
    • http://berkeciftci.net/flowkey_learn_piano_apk6nxfy.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/nhgjagj/lulemewusin.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/aT6ieAC/snake_3d_view_camera.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/nagovege-najojewami-kazomeroleliro-bubozujegiz.pdfIn PDF document text
    • https://denesibupu.weebly.com/uploads/1/3/0/7/130774977/ee77c14e4.pdfIn PDF document text
    • http://frut-tree.site/wiwuxusotobigotogabokugozk76zu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5ff7db382d0ae.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/18e288.pdfIn PDF document text
    • https://dajexuxeguse.weebly.com/uploads/1/3/4/8/134859846/kufofezu.pdfIn PDF document text
    • http://deemonatrafik.xyz/carrie_underwood_new_song_cry_pretty_lyricsexw81.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/kakekojezutok/pokemon_battle_revolution_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/media_player_notification_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/cheviot_school_uniform.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_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 5636 bytes
SHA-256: c6e84baa7d1a6f0ce423bfb4e66443aa3dd874dfa4a4dbfb58394c2adfe68497
font_01_sfnt_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 10404 bytes
SHA-256: 82aa57158363c8b1475e08259442cb32930177dece523ac23942a0e0a4ce835c

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