Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9048a055d7218a…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 19:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4e9be2e40b11f23f28209846e86108b1 SHA-1: 798682a86a78c4f2bfc0aea5b00a460d33879d2c SHA-256: 3d9048a055d7218a5b1aa23fe7049bcbe1fd10b5be8150e08a3934cae5c8249b
134 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains embedded URLs, with one notable URL being https://ponafet.ru/award?keyword=sap+accounting+module+pdf, suggesting a lure related to accounting software. The presence of multiple disposable hosting domains and link farms further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ponafet.ru/award?keyword=sap+accounting+module+pdf PDF link annotation
    • http://vexasefagi.scienceontheweb.net/58995137552.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/tafubifuseweda.pdfIn PDF document text
    • http://3203epworthcres.com/holmes_ultrasonic_cylinder_humidifier_hm411-btu-fca_instructions76kj4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_604de676302ba.pdfIn PDF document text
    • http://xopaberowiwin.getenjoyment.net/passages_by_gail_sheehy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_600f62ac8d376.pdfIn PDF document text
    • http://e-devletodeme.net/fundamental_theorem_of_calculus_proofjmd7y.pdfIn PDF document text
    • http://flipping-car.online/efi_is_dilated_by_a_scale_factor_of_1_2cfjh2.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/alcoholic_cocktails_recipes.pdfIn PDF document text
    • http://mokuduvejevuz.scienceontheweb.net/79191767859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_601868da24ff7.pdfIn PDF document text
    • http://lovemecompletely.com/flip_surfing_colors_mod_apkmxeq5.pdfIn PDF document text
    • http://itsnat.space/91770599595ltc8y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexekuduwowig.atwebpages.com/wemimupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b558421b-8a05-4972-89c6-4126a2f70bca/52118781446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2441b28f-6a82-40de-8b0e-acff8b5dd248/live_like_a_dream_lyrics_30_seconds_to_mars.pdfIn PDF document text
    • http://womidelere.myartsonline.com/76221981266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43dda75-7fc8-476e-9e8b-502280543ffc/abu_garcia_pro_max_spinning_reel_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952bb7bd-b951-40d0-b0f6-48fc1cfab1bf/forefomurawitupefatan.pdfIn PDF document text
    • http://gumizaxewa.atwebpages.com/u_verse_tv_guide_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba393b6-b751-4f91-9917-6b87fc69b5a1/54819718181.pdfIn PDF document text
    • http://widifusi.myartsonline.com/17427514175.pdfIn PDF document text
    • http://sazoser.myartsonline.com/glencoe_high_school_chemistry_textbook.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_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 5304 bytes
SHA-256: 6f27ca8c6c9193d6500f1b373b233f503cd7af1178a2ac3164c129e7d25fbb2a
font_01_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 10840 bytes
SHA-256: 184669155937b99a9ec4c0628c454c2107005317036fb7258ba410db98451f6a