Malicious PDF — malware analysis report

Static analysis result for SHA-256 c561b277cb0eb0a4…

MALICIOUS

PDF

206.3 KB Created: 2021-05-08 07:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 69b42e0762b2b6e98b66b25ce80077e6 SHA-1: dd5d8c2f63ee0de1fdbba63b32a481d9158742a9 SHA-256: c561b277cb0eb0a408f2f8ca55dcff564efddd99ecfd2e0ad62e42ddcf4186c9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text fragments related to product searches, suggesting a lure for users seeking specific items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=epson+wf+2630+ink+asda PDF link annotation
    • http://pay-order.info/19024626152cklw3.pdfIn PDF document text
    • http://swiss-gear.shop/21142506905d07cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_6041e6f7a5055.pdfIn PDF document text
    • http://50offstore.pro/imaan_beimaan_film_songvwk4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_602aabef14988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_6067235e75a83.pdfIn PDF document text
    • http://polystate.ru/45541017656ebyyp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5feb9acbe48a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_60694624bfb23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5ffe4e060ea62.pdfIn PDF document text
    • http://sk-anker.ru/121910047365vpez.pdfIn PDF document text
    • http://freud.icu/jazz_chord_progressions_piano_bookvx4fm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fc909341f819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449614/normal_6002802e27553.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491433/normal_5ffb37af69b5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_66e67c630f56466b963ffdd663ea7460.pdf?index=trueIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_3f4818f09e8f4dffbe23c0fe0b576cfb.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_4e6eb2fb83a24611ac9ae69cbfdcad9f.pdf?index=trueIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_9c46b7fc338e4768a9be4eaf69266ec6.pdf?index=trueIn 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_off0002f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F5 5612 bytes
SHA-256: 8e995135462e63838ddc24ac67ae34914e82873c1d2c2e89fef84bac5293aaf4
font_01_sfnt_off00030741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30741 10696 bytes
SHA-256: c9b58835c75978dfcb6a8a77e3858cad5f62e69406515c6a4ec4fe794343e37b

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