Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d2456159bf7ca6…

MALICIOUS

PDF

64.7 KB Created: 2020-11-14 04:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061486fbc0c1d08c7fa068efbc71f49e SHA-1: 9d1f7890cf191334519ad82e4bf0bdf014dce233 SHA-256: b4d2456159bf7ca6dbb13780534216b27cb8db9c1b93781ce60b8fa93b1de844
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating the presence of external URIs and urgency lures. The document body, though heavily obfuscated, contains text fragments related to 'cake dimensions' and application metadata, suggesting a potential lure. The primary IOC is the external URL found within the PDF, which is likely used to deliver a secondary payload or conduct phishing.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/aws?utm_term=bjs+half+sheet+cake+dimensions
    • https://setirinovaj.weebly.com/uploads/1/3/4/5/134528330/vaguloxesowibap.pdf
    • https://cdn-cms.f-static.net/uploads/4444882/normal_5f9e1594896ed.pdf
    • https://poxusesemeli.weebly.com/uploads/1/3/4/4/134462398/7184279.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdf
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5fa8a45ce5bbd.pdf
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5f9cc3f59f03e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanasuvedigo/kokuxizupedajegina.pdf
    • https://uploads.strikinglycdn.com/files/60358f9a-3919-4450-8232-0ecbf070b49f/guxabakeboropedusixisipur.pdf
    • https://s3.amazonaws.com/xanebavifamopez/wild_animals_name_list.pdf
    • https://s3.amazonaws.com/fizup/key_root_master_apk_kindle.pdf
    • https://uploads.strikinglycdn.com/files/d5923bd8-fe7e-4bb1-a559-4e7aca23d11e/zojez.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_off0000c120.bin
d7c1d6414ee56de3bda7a76f3dd9aeebc368b25c31adfe899f41fcc26f5a019c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 5356 bytes
font_01_sfnt_off0000d33b.bin
22827ac907c457af69d776f350e4d0fec0597dbba5abbecafb782802a20d3955		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 10272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.