Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3caa818b4dc3f31…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 13:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec35682fbf7e7dcdc8d6fb4346c8cc0 SHA-1: 51b38b36f788c0dc2a04f879350d725d53b92053 SHA-256: d3caa818b4dc3f31d41654f2de2d2b877ee2050a9c6bc77bb97a6d5648df3ea9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to artificially inflate search engine rankings. The primary URL, 'https://mezovuduw.ru/award?keyword=capgemini+technical+interview+questions+for+freshers+with+answers+pdf', suggests a lure related to job interview preparation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or redirection to malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/award?keyword=capgemini+technical+interview+questions+for+freshers+with+answers+pdf
    • https://cdn.sqhk.co/wifinalimow/gdAa2xp/dogalofimusifikete.pdf
    • https://cdn.sqhk.co/mivuxakadu/wmhbeH2/11908435407.pdf
    • https://cdn.sqhk.co/bularalunop/TiagcaM/refuzetetasumagivi.pdf
    • https://cdn-cms.f-static.net/uploads/4412763/normal_6013e0ac74eb4.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fdc409d19205.pdf
    • https://fapusogemewesil.weebly.com/uploads/1/3/2/3/132302858/3100434.pdf
    • https://cdn.sqhk.co/wujakegu/abqCvzb/end_of_days_lyrics_gareth.pdf
    • https://cdn.sqhk.co/buwuvibija/jdhcjh8/nojawulifimosid.pdf
    • https://cdn.sqhk.co/leredupodeka/chahdjb/battle_royale_simulator_codes_wiki.pdf
    • http://vedakedudeloko.22web.org/adt_key_fob_battery_change.pdf
    • https://cdn.sqhk.co/bemememu/ge6icAn/train_simulator_steam_routes.pdf
    • https://cdn-cms.f-static.net/uploads/4459469/normal_6020c22e3146e.pdf
    • https://cdn.sqhk.co/xakelafu/UoI7uig/woxonega.pdf
    • https://moturepuka.weebly.com/uploads/1/3/1/8/131871952/1391775.pdf
    • https://cdn-cms.f-static.net/uploads/4404116/normal_604dc4308378d.pdf
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fd76b54b3f2e.pdf
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/aa166cc075fef9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rugeritubaduw.epizy.com/after_marriage_novels.pdf
    • http://losoxapo.epizy.com/ballaststoffarme_lebensmittel_liste.pdf
    • http://pokizepifowuw.epizy.com/75534561321.pdf
    • http://lazunebenak.epizy.com/free_admin_dashboard_bootstrap_templates.pdf
    • https://s3.amazonaws.com/jaxesabi/levobubitot.pdf
    • https://s3.amazonaws.com/lurutopobi/tokirisotav.pdf
    • https://s3.amazonaws.com/xidulumexi/acer_aspire_e5-_573_drivers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13c.bin
7b482f3c4b4c9eb2b1ee6a4ddf51b3a57c06b5998f411ecb6dee30bad2aa2fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 5752 bytes
font_01_sfnt_off000104b6.bin
e930b691c223858197e874f06e0128f038ce0cc53bb95be3265724ecfa0fad7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 11224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.