Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a191e01a7e6cd7a…

MALICIOUS

PDF

65.6 KB Created: 2020-12-16 21:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 120c5874e2fbec3cc1ad926fd7c8ffbf SHA-1: dc39123c5ee08f1da943cb070fe941dfc857ff1d SHA-256: 1a191e01a7e6cd7a5c01bf6f48383f5435fa6db3fbacdefebc8dfcf01deaa907
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or trojan payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

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://cctraff.ru/strik?utm_term=mass+effect+redemption+2+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f89cff37897a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402745/normal_5fc076d943f6b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7354785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_5fb9defa33deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5fce25d56aae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f9d4dcd600c2.pdfIn PDF document text
    • https://jabanomazekapuf.weebly.com/uploads/1/3/4/7/134743752/gapisuzosali-pufuwupedemuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_5fb98988b818c.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/5fced25e6d04bc46d039765e/t/5fd6f9e4acac596b0cd06a2c/1607924201324/79833794670.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/bihari_video_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33b8b3dfdd95b60e431f6/t/5fc571689d793648404612d7/1606775144966/donjoy_defiance_iii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63be5a30-8c60-430a-aa77-d108a49fc0e0/restaurants_near_maine_state_aquarium.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_off0000c33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33C 5528 bytes
SHA-256: 017ddc84614295df5d008d8c08ba98b069360613dffbc8e155785ebb78ecec5f
font_01_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 10332 bytes
SHA-256: 7d0d2c53dec53c54aaa745b9d35d7618684b71e015f3ae36cf1d95e6e945cee6

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