Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed10db66d9d932ef…

MALICIOUS

PDF

75.5 KB Created: 2020-11-12 16:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0fa8569a0fb1c72fd4d1c65ae9b0d0ce SHA-1: 7ad6a0e0e2de77015f507b5ab0bd31743323817e SHA-256: ed10db66d9d932ef73086ffd0c149bc49e25a728171d4d711f6d36a9d7c2d84b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with the primary malicious URL being https://trafffe.ru/123. The ClamAV detection further supports its classification as malicious, specifically as Pdf.Phishing.Trojan. The embedded document body, though heavily obfuscated, suggests a lure related to 'weight lifting for female beginners pdf', which is likely a deceptive pretext to drive traffic to the malicious domain.

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://trafffe.ru/123?utm_term=weight+lifting+for+female+beginners+pdf PDF link annotation
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/gaxabigenobu.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/puroboruza.pdfIn PDF document text
    • https://losepubi.weebly.com/uploads/1/3/4/5/134502138/xazuje.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/bidivo/chemical_principles_by_peter_atkins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ecec2b-7e19-4705-a6d7-f3468f9fffe5/gakesaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/those_who_cannot_remember_history.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xatuvurixorivug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cafc6c-0064-4683-9a0f-30813e98e916/sextuplets_show_in_alabama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d4669c-049b-487e-a7af-a5ace05c786c/6764234107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4865e28e-78f9-4191-b148-85adb260fc69/78111153768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e4a16e9-4981-460f-ba9f-e4b03d70eca1/13133331205.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cambridge_igcse_mathematics_core_and_extended_fourth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/weketozomanu.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_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 5608 bytes
SHA-256: ffb1955b388a17c91c215d9aebcb5c0fd937b86947347a283fe6424f17b664a0
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10300 bytes
SHA-256: 4d9915df637cbb773788a3b3edfd8854fff4e50d79a64ed8d3e6fcc545e44f0a

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