Malicious PDF — malware analysis report

Static analysis result for SHA-256 7279d665190422b0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 22:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 334bdc717e6952b7301aa0e3b6a262f9 SHA-1: f129d5d75a2e199763d26ce753346d30720100dc SHA-256: 7279d665190422b0d83c78e9eec73b993dfa1310a9a337cbd1c4c9d52240c1e1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=blank+brochure+template+word PDF link annotation
    • https://cdn.sqhk.co/wojusipi/ghohbM5/33730948447.pdfIn PDF document text
    • https://musekakilex.weebly.com/uploads/1/3/1/4/131406804/wofigafokivowo.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/hgLjbIg/kixubuf.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/gerivama.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/yjbggjg/46602318321.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6003037.pdfIn PDF document text
    • http://jikitosot.22web.org/12159131412.pdfIn PDF document text
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/6997243.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/869f3d55-79d6-42c2-bbcc-532a516cc40e/how_to_connect_qcy.pdfIn PDF document text
    • http://zajozikudesurek.epizy.com/19470787425.pdfIn PDF document text
    • http://xoxiposewarewa.epizy.com/kapufowinaromudiwudu.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_171274bb7a444177b22f4ee393fe559b.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_aa3f579baf064d49a4e61d14316a419f.pdf?index=trueIn PDF document text
    • http://rigatage.epizy.com/balance_de_materia_sin_reaccion_quimica.pdfIn PDF document text
    • http://xubivinonoloru.rf.gd/geez_amharic.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_ef3e69eccca74a0c89d8d2334ab818ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/838e2025-04f3-4b47-8327-029305aa6711/21758964632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517d1b9f-c8d8-4711-807a-302968cb76a8/noco_genius_g3500_bedienungsanleitung_deutsch.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_7eab0633aa8742439d373947c7b0db36.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_c8dcdb0d1d30460185a8bcceef23eddb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7694f6-3c3d-4d1f-b746-8b88eaa17f87/historia_natural_dela_enfermedad_del_dengue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b4f889-52fb-4417-935a-a200820a2acf/lg_wireless_earbuds_with_microphone_for_iphone.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_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 5480 bytes
SHA-256: b9ed635ccfae73ad2886016c2ce9e45f719ab5b0c649462a769295e93ce7e49c
font_01_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 10712 bytes
SHA-256: a41f3163abe6fd2b0d4a5ab436bd2a0254b6e814e4f2a746794b61e7362127f4