Malicious PDF — malware analysis report

Static analysis result for SHA-256 295ccc5446cda38b…

MALICIOUS

PDF

75.7 KB Created: 2021-02-14 22:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dfb9b35c61ab945abb24eaf6f472a6b2 SHA-1: 6b6341fb63c927a1414bf84b3be0031104dcc048 SHA-256: 295ccc5446cda38bc7e0b8935167b8bb091dc14591261731659f93dfbcafd22f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=world+of+tanks+blitz+hack+apk+2020 PDF link annotation
    • https://cdn.sqhk.co/vuwonesi/fhjhahf/rawox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fe265900fdcc.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/djeLzji/video_editor_apple_app.pdfIn PDF document text
    • https://wonaxegem.weebly.com/uploads/1/3/6/0/136049801/db70a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_60164b561ec68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_6004e193a8802.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jbGhdwp/amazon_prime_comeback_gutschein_einlosen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_6006f947b28a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ff26bdece3ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_60282aee61e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fe7cde7bde26.pdfIn PDF document text
    • http://nogefiri.iblogger.org/com._free_vpn._vpn_master_apk_mirror.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_600f74027a8af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surozot.rf.gd/19207490961.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_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 5784 bytes
SHA-256: 39e29e7587631d926ce6e5895363f5586c8a1fc95e719fda033bbe1283d1074a
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 10316 bytes
SHA-256: dabe2760f2dc6d725c12655b87e0334209b8c8539296f742d16923502dc388d1

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