Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7242edc3192ec1…

MALICIOUS

PDF

71.2 KB Created: 2021-03-23 10:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ff8c42d509bc79342f4a262e4d09bee4 SHA-1: bf05dfd8f2fd97a93e1195bdeaed41fa97f4f991 SHA-256: 2c7242edc3192ec1f80a1b7915b568bbb9df9460ebcb264a4dcb4cd35d85203f
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates suspicious content within the document body, likely related to executing commands or scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://soxebez.ru/award?keyword=ordering+rational+numbers+on+a+number+line+pdf PDF link annotation
    • https://cdn.sqhk.co/busanurutar/cogcbwn/88224662041.pdfIn PDF document text
    • http://degitowexara.iblogger.org/what_size_tire_does_a_2005_dodge_grand_caravan_take.pdfIn PDF document text
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/xogezasorun_tisaxupinu.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/ehdhgih/german_imperial_ambitions_ww1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5fd1c456854ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_600b14c00a11a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5fef35d4dc0b1.pdfIn PDF document text
    • http://gelixovuxa.22web.org/devuxusabupatov.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/aJMyUgh/dune_2020_cast_feyd.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/yVNaJja/cute_hairstyles_for_school_curly_hair.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417313/normal_5fcbb147009f6.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/ehcQhfl/iced_matcha_latte_starbucks_price.pdfIn PDF document text
    • http://sagiberufof.22web.org/78619032828.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/1966633.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/44In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofosuxubajo.epizy.com/game_beach_buggy_blitz_apk_mod.pdfIn PDF document text
    • http://suvokejixu.epizy.com/4551138769.pdfIn PDF document text
    • http://gafojokogez.rf.gd/korogotozofev.pdfIn PDF document text
    • http://perorudo.epizy.com/homero_odisseia_frederico_loureno.pdfIn PDF document text
    • http://rajimorix.rf.gd/how_do_you_change_the_time_on_a_radio_controlled_clock.pdfIn macro / runtime command snippet
    • http://savikolapuxol.rf.gd/whatsapp_plus_apk_v6._80_latest_version.pdfIn PDF document text
    • http://jerovesunok.epizy.com/konica_minolta_bizhub_363_user_guide.pdfIn PDF document text
    • http://zegeridibedile.rf.gd/greek_gods_family_tree_worksheet.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_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 5528 bytes
SHA-256: 86de54ecf17b3b68b410eddf6ccc1029146342d6d387dca59ee68aa892c0a75e
font_01_sfnt_off0000eb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4E 10368 bytes
SHA-256: bbf6f1660a4a8d9c1374c9f8258b349726fc48f4ac024d59c1f739e0d9cef8a6