Malicious PDF — malware analysis report

Static analysis result for SHA-256 3179b9dd9cc9eabf…

MALICIOUS

PDF

68.0 KB Created: 2020-12-14 09:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f439a7e126314cc91cab47ddf163c141 SHA-1: bc6e5455295ac7cfcb76b349a2aa8398551d555e SHA-256: 3179b9dd9cc9eabf5f85473c6c21e5d80924abc20ec1058cee49d896b9f2faaa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=delorme+inreach+se+satellite+communicator PDF link annotation
    • https://xiworibamenu.weebly.com/uploads/1/3/4/7/134728691/ramep-ritenil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f87664abbbc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fbb5067285f8.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/63175e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fd384d1a36e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fb509809b248.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/820f3133d7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f9e5018b08c5.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/5fc51642239b0722914c4266/t/5fca3601be6684539df47491/1607087619263/shooter_mcgavin_happy_gilmore_swing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf3a5e8e827d428d5c84/t/5fc0fd24a97599144e1a7c1d/1606483236847/tubajujipelolok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77f6f579eee3ae06e1abd/t/5fcd8c1beb18547f4b9d51f3/1607306269590/zosasibesulepezik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5066e104edf1d779b9afc/t/5fc912d0c193ba7a99c069a1/1607013072921/word_collect_cheat_level_544.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc170e692c50b1a1e7b565d/t/5fc32adc08845d0924f1443d/1606626013219/8214793467.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_off0000cc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0E 5036 bytes
SHA-256: e5238bb67d1686d41c31be87775e4d05da5b47822ae7a7bda5a1ed51ed1099c4
font_01_sfnt_off0000dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD02 11124 bytes
SHA-256: c444b771b5beced3a536882054e084e5bf41db56162a0eb5a3bb7651595ed3e8

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