Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c735ee4361e578…

MALICIOUS

PDF

74.6 KB Created: 2021-02-24 05:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 991c1e9664fe4ce630e8c2e78cb14e3f SHA-1: 28a27f57f1cd55ba16915d8fe1abecbc46d15f17 SHA-256: 07c735ee4361e578533921c4e15d5e8fbb5b8ca9a32102ceebe30c54338470ad
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload 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
  • 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/strik?utm_term=c%252B%252B+graphics+tutorial+pdf PDF link annotation
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/wigijabedaromize.pdfIn PDF document text
    • http://idealsit.space/dedevupokoduxufumujigonaeyv5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_60120d75b7c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_602fbe3350016.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/cjchdji/templar_battleforce_rpg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374376/normal_5ff5c0b246cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/Ucgh6ic/fapob.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/yjfMvK6/nafuxur.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/jukoxisojow/81313828536.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/58599718680.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/ableton_live_para_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/tasalibe.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/zulimatizogorixagemo.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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 5320 bytes
SHA-256: 4ed36fc3bfec442fc696aa4c1931149c16293494357fee2eef43d2e627c00994
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 11144 bytes
SHA-256: 1b8ea1c866342280b3de92f0ff0c15e3bb64616f0f53c45926a2690cdd3fb3a4