Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb9fd0203f20fe6…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 02:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 51153ede40d9535321d120d8ffc29c0f SHA-1: 2695b81fccb0fc48f379f10e401bab1c30fe601a SHA-256: feb9fd0203f20fe60327ad674ff599268687695bc60a3c4a97f2b15398f86dd5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam tactic to drive traffic to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, hinting at its generation method and potential purpose as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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://gimoguvi.ru/wix?keyword=the+vixen+diaries+pdf PDF link annotation
    • https://radojevujexoki.weebly.com/uploads/1/3/1/8/131871685/acf00f83.pdfIn PDF document text
    • https://wajupera.weebly.com/uploads/1/3/4/7/134763514/jejajugowizadisa.pdfIn PDF document text
    • http://fastnoutservice.ru/club_car_precedent_replacement_front_seat_black_cushionsfb2cr.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/guruveferazoje_xupol_sevolineloj.pdfIn PDF document text
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/4387699.pdfIn PDF document text
    • https://nulijuvak.weebly.com/uploads/1/3/3/9/133986618/tuluresanew.pdfIn PDF document text
    • https://loboweron.weebly.com/uploads/1/3/2/6/132681880/9324976.pdfIn PDF document text
    • https://kivifakan.weebly.com/uploads/1/3/4/8/134870172/9f9f12dd55a9.pdfIn PDF document text
    • http://getplafond.xyz/sizakosivaspp9c7.pdfIn PDF document text
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/7a3dc5f.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/gutetobatuvimiv.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/3551270.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/3316860.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/mapixolulozojomi.pdfIn PDF document text
    • https://lepifopinitomo.weebly.com/uploads/1/3/2/6/132696280/9e89ae8.pdfIn PDF document text
    • https://lemusovigezamo.weebly.com/uploads/1/3/1/3/131381045/8103b622b.pdfIn PDF document text
    • https://fujolununepa.weebly.com/uploads/1/3/4/6/134683680/taxotebip-sovepifeveta-xojekonusufog-dolujedav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6efa34-480c-443b-a234-9dfdac4c97e2/busemakurifefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812fc96c-24e6-4daf-a401-4f0ebf08c4b8/quantitative_methods_for_business_anderson.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/algebra_1_graphing_linear_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/42913865976.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/jojolowidoxuzolutexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4799466-f30f-45ce-887e-8c01c22ec938/25719200650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0686d807-4755-4740-858a-2b629e79723f/wojeguliwuwufakodur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c6b3fa-e7c4-4460-b995-f16be23dcfaf/hp_deskjet_3050_j610_network_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/logo_design_contest_india_2020.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_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 5172 bytes
SHA-256: f85cb0c84884f271798517f7d501708d5614c47b0ff58a92a8f74805eddc348f
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 11588 bytes
SHA-256: 6ff8df8ce395e67330245d19393db7fa56ba54dfbc01e6879f358de7fe504082