Malicious PDF — malware analysis report

Static analysis result for SHA-256 976258bf61f19253…

MALICIOUS

PDF

68.5 KB Created: 2020-12-19 10:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58443f92b79fa5f299a90a3769743e6a SHA-1: 64d80d6471ec2f782760dd566d71656c3323319f SHA-256: 976258bf61f19253764d924a2fc8d43727a2c3b83de2c2dc02078b21cadd7d6c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be part of a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=ncaa+soccer+championship+2018
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/lidijalosog.pdf
    • https://zotolujirerezo.weebly.com/uploads/1/3/4/5/134582396/gusutevarevopel_buxorawatonabo_fuzoguvalukaj.pdf
    • https://nufirejibojo.weebly.com/uploads/1/3/4/6/134645492/3784108.pdf
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/5963248.pdf
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/kirib-rovuwuwa.pdf
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/vajijiguf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc540ba116eb00e3c6894fa/t/5fcbd64b36758319a55e0cdb/1607194188706/pixel_film_studio_toolbox.pdf
    • https://static1.squarespace.com/static/5fc12c5140f1034a5caa9112/t/5fce3b39260a660a6b066e55/1607351102039/42258508476.pdf
    • https://uploads.strikinglycdn.com/files/688b2c2f-6a0f-4146-9d42-e508ec36b87c/sobegovijusoda.pdf
    • https://s3.amazonaws.com/ziwuvijevo/formidable_stromae_lyrics_english_translation.pdf
    • https://static1.squarespace.com/static/5fc6f9e743c5ee75bf298103/t/5fd6fc16e5ac58289637c7b8/1607924759137/50963917619.pdf
    • https://uploads.strikinglycdn.com/files/4922cb6b-2e02-45c0-8eeb-1e958bbbfeba/meborukamofawox.pdf
    • https://s3.amazonaws.com/zirojopemup/jilusawosid.pdf
    • https://static1.squarespace.com/static/5fc6df4944e997374a292d60/t/5fcaff7e7ab0f364aba44fb1/1607139200346/nejufipudezixojore.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbbb.bin
2d337dca3a75f10bc6bac126bf0c1c8b91a0705b43aa03da91b9a2c1758da7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBB 5628 bytes
font_01_sfnt_off0000debe.bin
3a2c6b54ff8f761f5d198a0435a3ad64b0dec684c01b9cd9201cea3ef7f7b50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 11444 bytes

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