Malicious PDF — malware analysis report

Static analysis result for SHA-256 69935329f8b36b58…

MALICIOUS

PDF

83.6 KB Created: 2021-03-13 19:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9e19dea5af88b2ae5ed8fa5c198b5ed5 SHA-1: a3e27b59bc77700e07482d36e9148b71cea4573d SHA-256: 69935329f8b36b58c615cd6608da9430667abc7e86bf6cac1a4171aab405758f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely leveraging social engineering to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=house+worksheets+for+kindergarten+pdf PDF link annotation
    • http://milimoje.iblogger.org/28402606115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_5fe66a2708fb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ff9ec72a7b43.pdfIn PDF document text
    • http://detonic-hypertonie.website/tusitirigowenazadi4trhb.pdfIn PDF document text
    • http://xutitubon.iblogger.org/31453145560.pdfIn PDF document text
    • http://sbrf.link/nefuvuxonudapamonegomv5lew.pdfIn PDF document text
    • http://50offshop.pro/wordly_wise_book_6_lesson_4gr3zt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_6001c86a5034e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/29b8e4d9-e84a-4bfb-9499-059b448850b2/good_credit_score_experian_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542cd89c-0276-4352-8e10-25a976f552b9/lemizorakefow.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_af7bca67025f4dbfb96e8917fe45fc4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c65ed3b-6261-4974-997f-7a26e39ade70/gijef.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_7f3b309613c44107b8d6fe97d9850a5e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbac097-4677-4b6b-82ee-bb8aa7d03dbf/dixinawajule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8d422-6d6e-4fe3-bc52-8f22ac2b4595/51368067507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe7c986-2764-4e75-8a1e-8cee14e30b55/59731400167.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_2b0c333fae9241c2988dbc3e4e2fa282.pdf?index=trueIn PDF document text
    • http://jegozejixal.epizy.com/xuwenuderikobofoko.pdfIn PDF document text
    • http://zevizajezu.epizy.com/rexoxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 5268 bytes
SHA-256: 619dfa30ab21ce19cea5090075234165a9e3c7affb54de6fa0ebf734f885b721
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 11380 bytes
SHA-256: 93da73ea1a7092818640101167c6f6a9e9f72bb81676edddbd0e58ef2bd09de5
font_02_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361