Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e2217a06c4aba1…

MALICIOUS

PDF

73.3 KB Created: 2021-02-16 05:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 34483831ad9d3b0802d691f151c140cf SHA-1: d89815312d420b130851d50d422cc7f83882550c SHA-256: 54e2217a06c4aba1d2eeebbf82e521935a1e6fb15bfff997be2b173ceaf4eed9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or suspicious platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The primary URL, https://maypoin.ru/123, is presented as a quiz, likely a lure to redirect users to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=which+mbti+is+most+manipulative PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369316/normal_60291a679d8ea.pdfIn PDF document text
    • http://emirofficialzm.com/friendship_kavithaigal_photos2stj7.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/cgggjhK/diy_surgical_mask_no_sewing_machine.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/pepuxeloduviwejunumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_6004e5b5cdddd.pdfIn PDF document text
    • http://ipoteka.net/access_database_templates_for_clinics1ngr1.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/gifofomefimes.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/ghOX5qb/cardi_b_noises_download.pdfIn PDF document text
    • http://sozefavi.22web.org/superannuation_form_employer.pdfIn PDF document text
    • https://lerogufoporix.weebly.com/uploads/1/3/4/8/134885840/7730f4bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_601d17140ca93.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/uhfSMjf/ted_danson_wife_picture.pdfIn PDF document text
    • http://jadusugogawal.iblogger.org/bbc_bitesize_ks3_ict_spreadsheets_revision_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fd5fb6f0ff69.pdfIn PDF document text
    • http://imkl-checker.com/89757026487mh1as.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/jche6hf/journeys_interactive_series_mod_apk_unlimited_tickets.pdfIn PDF document text
    • http://unlockdeals.shop/nba2k17_free_downloadhjmy6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikikifuxax.epizy.com/kukaberu.pdfIn PDF document text
    • http://momerizimapunu.epizy.com/payaliya_bajni_lado_piya_video_song.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_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 5288 bytes
SHA-256: 042ae62edd311349d182c9da737016ca420b07ee6ffca523f0b7bb78e0b8f1f6
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 11008 bytes
SHA-256: 17972a5cf4364b1f994388bf3de1c8306442c6cfe1213c80fde723fb7429887c

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