Malicious PDF — malware analysis report

Static analysis result for SHA-256 0077adc38e31abe1…

MALICIOUS

PDF

88.6 KB Created: 2021-06-01 13:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6fc3188825d3eb57530323ad7c083e34 SHA-1: 51cf564b102105ce4bbe7a9e5f4f9d6ce1b47722 SHA-256: 0077adc38e31abe147701863baaa510bea82b1a66f81b502e9c61f743d58a067
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://chcial.ru/pbw?utm_term=what+does+it+mean+to+petition+god+in+prayer PDF link annotation
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/susonobom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_603dace7531b2.pdfIn PDF document text
    • https://pamumigupoxip.weebly.com/uploads/1/3/4/6/134614169/33469817bf36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_601b6699a7e00.pdfIn PDF document text
    • https://rowiranuzexu.weebly.com/uploads/1/3/4/4/134436227/92794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_6056dd4c71c1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5feb48966dacd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_605fe1cce401e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374532/normal_5fe17e6c39cae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_6004c198d6c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_5fda64bad6f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_60050fc3b5699.pdfIn PDF document text
    • https://rewajugelawuz.weebly.com/uploads/1/3/0/7/130738764/814954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ff9e4ccc767f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4380383/normal_60b5daa58d6f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_6023fc809d63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_60167effec530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6041e461441ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144450786/el_efecto_mariposa_pelicula_completa_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be820cd8-9c49-4aec-ab16-17e81004846d/como_desbloquear_un_samsung_j5_prime_con_patron.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/primavera_silenciosa_resumen_por_captulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05498e4c-cef3-4aa4-b0a7-5fbcc8dd481d/dungeons_and_dragons_gifts_2020.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/vuvugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a4d5d2-d83a-4ce5-bede-3e166c10b571/92054141504.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_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 5456 bytes
SHA-256: 7d4e85d4ae6f6e1d1970014b0ee486b22e0895b4890b624c354e8e670ff8a880
font_01_sfnt_off00012d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 12080 bytes
SHA-256: cd5732c8be2081edb6158252505fde394a916967e25805d6847fab9f262868e5