Malicious PDF — malware analysis report

Static analysis result for SHA-256 291c781c39bae335…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 23:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 40f45cfa36426642400419cbde4ba532 SHA-1: ee3e2e5a187d5386d23ca37299454ad0c7df8e25 SHA-256: 291c781c39bae3350512feb14c22c71255fe6b1d1dab515d995b59892cc56c45
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'ML_NYX_PDF_MALICIOUS' along with 'CLAMAV_DETECTION' strongly suggest malicious intent. The embedded URLs point to domains often associated with distributing malicious content or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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/award?keyword=biodata+for+marriage+pdf+file PDF link annotation
    • https://cdn.sqhk.co/wudawagirus/B4GM4jb/free_color_by_number_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/pjihdbe/eyelash_glue_business.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/74segiR/46071809461.pdfIn PDF document text
    • http://wownatural.fun/digelait82d.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/can_you_take_your_drivers_license_test_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/ghjfdgd/voodoo_doll_magic_trick.pdfIn PDF document text
    • http://bbflowers.net/how_to_reset_orbit_easy_dial9cg7f.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/neKha3v/71716909310.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/zaxby_s_catering_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/zadexona/ijfhfgd/21032591311.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/amazon_stock_todayl196v.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/gjthhha/judgement_or_judgment_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ghMibD9/rdr2_all_animal_locations_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/obituary_format_grade_11.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_37a08a174eb5480582122ad4ec2e6a3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/informed_consent_template_irb.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/wuxetilafarib.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_949b8dcb24f042c1b7f17121b123783b.pdf?index=trueIn PDF document text
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_275335950c584f57b23432f668ac2a1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/aneurisma_cerebral_sintomas.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/code_of_canon_law_1917_marriage.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/41152583823.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/xalubedozem.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_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 5232 bytes
SHA-256: 0b52e9541bb4ba898025562045ea8eb854c2ec35d62f8977091142fd1f09bb24
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 10460 bytes
SHA-256: 5207774eefc18548db742b040665f180d6529473758cf7b423bdc4696488b1fd