Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e23008e4f1dde3…

MALICIOUS

PDF

75.7 KB Created: 2021-02-26 02:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1091877ecabc4e8ae9f4184a34e963ca SHA-1: a06a3267b4a29dc4f42b32ec1b476cfbef0e6e99 SHA-256: b3e23008e4f1dde34983c79af3fd624e3279ea17f1e96c4817f90a4aa874495d
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URIs indicate it is designed to redirect users to potentially harmful external sites.

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://bologen.ru/wix?keyword=reinado+del+mar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602b8588e6017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_5fda2cb261237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fe35f743851f.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/jumarurodonegebezir9v7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_602fa6fc37ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/55jbZhb/maxewomutirom.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/PjgNic3/panic_alarm_cartoon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_6016b2ee8eb1b.pdfIn PDF document text
    • https://cdn.sqhk.co/lamidipeke/jiLibhi/easter_road_death_toll_2020.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/denokorinimobokoladagax.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/eK4pidh/47616876265.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/87562677684.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/icNphfh/live_wallpaper_for_samsung_tab_3.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/iDQOXDx/road_to_valor_world_war_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/Kb2haEn/fun_run_3d_mod_apk_unlimited_money.pdfIn PDF document text
    • http://bathforlegs.xyz/netbeans_java_config_file4ftj0.pdfIn PDF document text
    • http://voiprormul.xyz/wapedexeuea0d.pdfIn PDF document text
    • http://aydym.club/844208833959txi8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 4800 bytes
SHA-256: 225ec247edf39f241127e3065547167e284356cddae1ed952913b06f12df45e0
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 11372 bytes
SHA-256: b66dba67216500de719a4b71ac2fb83d1da58e606554e75fff50cefd6a1c0ca1

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