Malicious PDF — malware analysis report

Static analysis result for SHA-256 eceee1ebb9aa3ed4…

MALICIOUS

PDF

79.5 KB Created: 2021-05-23 03:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1a7a85e5a36cb0eb6bd97afed32c5ca1 SHA-1: 29e34504e1e570339bc0d3046e532971a513f07d SHA-256: eceee1ebb9aa3ed407c22dc5bf94d0e9e51f903c332e804301bd2888139ef514
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs further supports the attack pattern of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=how+to+use+a+diffuser+hair+dryer+attachment PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387699/normal_5ff26a3071988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_605f951de598e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_606396cf4fbc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5fded9a4c1992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_6060584f154b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_6039d5bd57990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_60341d7669f4f.pdfIn PDF document text
    • https://wusaworapivuwor.weebly.com/uploads/1/3/4/6/134659128/sutanenugokake-bedakutijagut-bezovodoweked.pdfIn PDF document text
    • https://dixatuwep.weebly.com/uploads/1/3/5/3/135398053/2018064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fdb75e7cff52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_6009a4e4a461a.pdfIn PDF document text
    • https://padawevuwelidas.weebly.com/uploads/1/3/1/4/131438111/gabet.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/48f4b64b-404c-498a-a37a-e697f7dd61f6/english_translation_of_holy_quran_with_arabic_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e20d03-71ed-4662-ba6b-e4c38ac56331/rajoluwewusaxexufiwigom.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/delta_34-444_splitter.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/janulesolenojekadubeso.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/aditi_sharma_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36cb86d-a2f7-4a00-966a-46d449aaedda/80985205133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699594f4-0f43-4a9f-8c74-1cfede4ef7fc/tedulimi.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/affidavit_of_support_form_i-_134_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f822248-f637-4945-b7eb-61b1ea98b982/94904996587.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_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 5384 bytes
SHA-256: 73fdc93c2cf782e0d0c84b0a1367147620b71dc702cf009a3b6fcd4279408713
font_01_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 11044 bytes
SHA-256: 856f3037d73b3f11f94c441b0a1758a68c29958fdc9f9f352505c14886cae9b4

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