Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be2a95c7828c678…

MALICIOUS

PDF

79.5 KB Created: 2021-02-28 16:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1967ac1e800e844f378657207c48eba4 SHA-1: 528cb59928ce939039ed5197147d38452b05232d SHA-256: 4be2a95c7828c678cb09c738a57fc1fb5c93bfebea2e0de1a1d9348b48f6d069
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains references to wkhtmltopdf and a date, indicating it was likely generated programmatically to appear as a document. The presence of numerous embedded URLs points towards a phishing or malware distribution scheme.

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://maypoin.ru/123?utm_term=can+a+three+phase+induction+motor+be+started+from+a+single+phase+supply PDF link annotation
    • http://shoes-storie.club/barish_wala_whatsapp_status_video0elgw.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/ap_style_guide_date_range.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464323/normal_6002a3798eb80.pdfIn PDF document text
    • https://siroxejuvumuku.weebly.com/uploads/1/3/4/6/134657252/1981215.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/25465627365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ff2c412ae8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_603aab7353882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369305/normal_5fcaaa6c6a1b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_603b18f77415f.pdfIn PDF document text
    • http://bigops.fun/how_to_make_an_origami_crane_with_square_papericj8v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_6000aabe19244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5fd7958b23215.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/the_bluest_eye_quotes_with_page_numbers.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/asus_xonar_dgx_uni_drivers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463785/normal_5fe466457c7ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/jisux.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_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 5716 bytes
SHA-256: eca9a081d0ce0ea488c8ae6b24d6e698a35e290ac16937485d48a1d5d6820eda
font_01_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 11436 bytes
SHA-256: b0c7d60da5b721599b22e965e7c1560fdc39066827e47aab2a8e8b680e3f5fb8

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