Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f949bc2f6a82e84…

MALICIOUS

PDF

93.7 KB Created: 2020-12-19 03:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5bc5921cef5748f917b9378f578df21a SHA-1: 7c1f5c936ce20f744356e5f7e7d379d8bbf5ec1c SHA-256: 3f949bc2f6a82e84ba940b0a80cdd724a4d01af2ddc61988447436f11f4e7997
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one suspicious URL pointing to 'trafffe.ru'. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_URI', suggesting the document's primary purpose is to redirect users to external sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malicious content distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=daisy+cookie+badge+placement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5fa5a8da792cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f95e545a269b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5fa0a06fe2582.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/3363307.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6fd919849b27a00a3c0c7/t/5fcd071174a40730fb9cecf5/1607272210202/sandeep_maheshwari_imagesbazaar_wikipedia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fd16a0e880fa23343c7dbe9/1607559696404/xebojivi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8173599a867de449200/t/5fdcec4f837b2272d87beeb0/1608313936714/formal_wedding_dresses_pakistani_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/dewopav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd379fff074777c983261b/t/5fdd4aa3f5f64226562ed461/1608338084016/34864408311.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d452bda9c57a97d752dd/t/5fcc9876260a660a6bd60663/1607243894529/xavibanojemesil.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/third_age_divide_and_conquer_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/juvof.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_off00013265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13265 5600 bytes
SHA-256: 42167301d7e839e2a5ae193f002f2b0554007f0f48d9873ac12b07f149d61f49
font_01_sfnt_off0001457c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457C 10700 bytes
SHA-256: 10e178af61cf85b0fd6a0456007cf65133fc1eb5d5a170cabd462b2934628602

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