Malicious PDF — malware analysis report

Static analysis result for SHA-256 746b3fdc3427a741…

MALICIOUS

PDF

69.4 KB Created: 2021-01-01 02:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 89ee3b6aff4dae5f9728d4fcaf9d69b9 SHA-1: 90cd38f9292947a9458bec34cd56c1af45d5af16 SHA-256: 746b3fdc3427a74179e5f38d892e9f6a297214bf9d219bebabe9659fc4d773d8
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with several identified as malicious redirectors or part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=american+government+textbook+magruder%2527s+pdf In PDF document text
    • https://cdn.sqhk.co/lojeliju/iljhgcI/best_free_photoshop_app_for_windows_7.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/6875768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fdfd6bb2b781.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/e894691e239e.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/dirolikuvu.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/318199a523.pdfIn PDF document text
    • https://kekidebas.weebly.com/uploads/1/3/4/6/134633427/3738087.pdfIn PDF document text
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/tewuwedexunavugomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/new_arabic_songs_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/radiwamox.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/badosigejurojeg.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/7631287035.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/adobe_animate_ad_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/35933828452.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/abraham_hicks_livros.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_off0000cea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA4 5800 bytes
SHA-256: 0c24519ae4f03d5f2dc44ffcfeed87312d10ad500f8efda60fb057a082f9d512
font_01_sfnt_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 11472 bytes
SHA-256: 8115f9f84e1e0989ea152548189ec9169f80176ed5af0a24d695473e96c2f010

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