Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e37f2f88f913409…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 21:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4de42dd910d9c598598f6ca1360334cb SHA-1: a61effb67e93dc9b04ddbb2889f3ed34f64fc928 SHA-256: 8e37f2f88f913409ed9b0fadd85ffd5a4aa3b2f72922fa3fafe79d0d3ea5d8ec
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary heuristic indicates a link farm with many external PDF links, some pointing to disposable hosting. The embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=girlguiding+new+guide+badges PDF link annotation
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/xidategebegobavo.pdfIn PDF document text
    • https://sosatiga.weebly.com/uploads/1/3/1/1/131164398/384986.pdfIn PDF document text
    • http://familyit.info/servant_leadership_greenleaf_quoteszxp0k.pdfIn PDF document text
    • http://muzoc.xyz/tisobevuxiwadaki9m5ah.pdfIn PDF document text
    • https://nejajabowiwuxo.weebly.com/uploads/1/3/0/7/130775705/6327222.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/ePicKFr/sonic_the_hedgehog_movie_minecraft_skin.pdfIn PDF document text
    • http://questotzvezd.space/89802372012pwgl3.pdfIn PDF document text
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/7036431.pdfIn PDF document text
    • https://ludabasekid.weebly.com/uploads/1/3/2/7/132740342/xidubekutosasibozub.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/giiehfo/koliduxotesunuja.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/vodapomekov_dadazib_lesekijul.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/vurusuxoza-pekozususa.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/iafhj5q/xufetarewufefow.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/1624796.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/gezugigudufutix_jibejafaxiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_c116941ae9734f5cb9c29316f442dd56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/bga_full_form_in_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/desiring_the_kingdom_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/bet365_poker_mobile.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_09b3d5f39de44e38bf4f9caf0dfcbb3d.pdf?index=trueIn 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_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 5256 bytes
SHA-256: bbcd45b71de1dd5f786e95333450053d02372f3e28c2a2a98b09ef48a9e0cebd
font_01_sfnt_off000119f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F1 10220 bytes
SHA-256: bc9b61accf481b77ae201ddef38d327a52b6c3272e28bb7cbba0ad7f7467413d

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