Malicious PDF — malware analysis report

Static analysis result for SHA-256 94866d3cb83fba14…

MALICIOUS

PDF

82.2 KB Created: 2021-02-26 16:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a65a052db0b60a85cdffc8956d2a7865 SHA-1: 99dbd8f0557e6b4c607bba0ec3fdfbc6eb985b65 SHA-256: 94866d3cb83fba141c03d16d28309b7cff212453e0d5cb20137bb46dc53f1dae
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML classifier score indicating maliciousness. One URL, 'https://nipisod.ru/award?keyword=difference+between+sena+20s+evo+and+30k', is directly referenced in the document's metadata and appears to be the primary lure. The presence of external URI heuristics and the ClamAV detection strongly suggest this PDF is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=difference+between+sena+20s+evo+and+30k PDF link annotation
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/4670086.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/alaipayuthey_songs_mass_tamizhangyd8a.pdfIn PDF document text
    • https://bawobejeburojax.weebly.com/uploads/1/3/1/1/131163695/7971097.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/how_to_do_dilations_with_a_scale_factor.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/sipazekava.pdfIn PDF document text
    • http://instas.site/bleach_illustrated_guide_to_soul_reapers2bbcm.pdfIn PDF document text
    • http://agreevudb.rest/what_are_the_major_types_of_production_processesfyirj.pdfIn PDF document text
    • http://salonlabs.xyz/bilyoner_android_gvenlimirtges.pdfIn PDF document text
    • http://marketop.club/64283983695uv9l4.pdfIn PDF document text
    • http://texitow.iblogger.org/36347110536.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/jusebet.pdfIn PDF document text
    • http://regsenatvumen.website/dropcam_pro_user_manual4i9sd.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/fonupodinavo-womebigobivoko-votefedafa.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/home_warranty_wont_replace_furnace.pdfIn PDF document text
    • http://akvatehnika74.ru/58775416088ipj2u.pdfIn PDF document text
    • http://shoop-fl.ru/cheque_em_branco_filme_completo_dubladol4ukm.pdfIn PDF document text
    • http://ejinaya.com/which_word_does_not_belong_to_the_group_shoes_belt_wallet_shirtvukw4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://womufigi.epizy.com/technical_analysis_explained_martin_pring.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/72478280.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/lirupidejor.pdfIn PDF document text
    • http://lamupilabixekuw.epizy.com/king_single_bed_flannelette_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 5564 bytes
SHA-256: ea766c89f84b07be26b7a0fb7693b4b3583d6ffeead77c48ba32866047ca2eb2
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 10400 bytes
SHA-256: 2e99a5e649d41ef5bcbb25f0322da4f7a50c87b538529ff4f3f2bd3f5eaea4ad
font_02_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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