Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0b8a5f720e32f9…

MALICIOUS

PDF

85.7 KB Created: 2021-03-30 15:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 02fcd6dac88ca01f4e7fdc76d896546f SHA-1: 1a95a68dbf3163497e36066da2d75837ee0ef3a8 SHA-256: db0b8a5f720e32f917b1b7bfe9141f861df9db565916bf83bf0260f077f2810f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive links, aligning with a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=algoritmos+geneticos+inteligencia+artificial+pdf PDF link annotation
    • http://borejukeluteva.mygamesonline.org/define_trichromatic_theory_in_psychology.pdfIn PDF document text
    • http://reawont.online/620201251804u0rc.pdfIn PDF document text
    • http://shoop-fn.ru/63567516229vs23w.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/55974515006.pdfIn PDF document text
    • http://khareedforosh.com/besinebasiic8i3.pdfIn PDF document text
    • http://krokoboko3.xyz/kann_ich_media_markt_gutscheine_bei_saturn_einlosenbdx4c.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/pacsun_application.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/ha0ShiI/los_angeles_dodgers_wallpaper_2019.pdfIn PDF document text
    • http://egosikenclub.com/ugo-v_ii_vape_pen_instructionsme9ua.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/mukibakirune.pdfIn PDF document text
    • http://dezlice.ru/91842910583ytxv3.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/JjedmXJ/38059851073.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/jeiiicj/zisajoz.pdfIn PDF document text
    • http://bet-info.ru/zirakajiguzotepuxoxwqghe.pdfIn PDF document text
    • http://sedikasa.22web.org/wing_chun_close_to_me.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/hhcJhf1/mojojulinesematixusajeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajokonola.epizy.com/mekanisme_kerja_antijamur.pdfIn PDF document text
    • http://favuzokusom.rf.gd/chandrakanta_novel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/razatosorukupoputuz.pdfIn PDF document text
    • http://welidigukiru.epizy.com/online_launchpad_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/tubosemofulep.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E83 5464 bytes
SHA-256: d7230c676bce7df9a24d12d1fe2465f106cfd203e8729b8b5a487252111a636d
font_01_sfnt_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 11844 bytes
SHA-256: 273319d0940415680aaf1b45526de4806e063024e8a9320dadf42a3b8ced0768

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