Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a6c25216d57133…

MALICIOUS

PDF

94.1 KB Created: 2020-11-25 09:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea919f86f9c7674b043fc748a46ba1b2 SHA-1: 769212f1d7280db8996020922fbe4bf7a315a806 SHA-256: b5a6c25216d57133648eaa314a76c57c6d6ec64f2563545a34792619d62961dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The presence of a URL related to 'sims 3 ghost' suggests a lure to attract users. ClamAV detection as 'Pdf.Phishing.Trojan' and a high ML classifier score further indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=sims+3+ghost
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/wukadadazido.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fa2c4ffb71c0.pdf
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/9824777.pdf
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8715fcd9cfe.pdf
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5fa463d6e4bd4.pdf
    • https://cdn-cms.f-static.net/uploads/4455681/normal_5fa45ef8568b2.pdf
    • https://gemamiji.weebly.com/uploads/1/3/4/3/134372226/rutoboxudumilavuzaji.pdf
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5fbd1b2bcf0d6.pdf
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5fb8d9c2e3744.pdf
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/wulowogelupus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d694e2d3-154b-473e-b389-57d56859d512/xurenolixeja.pdf
    • https://s3.amazonaws.com/debiwelof/100th_day_celebration_korea.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_off000130dc.bin
12f8d12c82b54a9bc80d6dc82298318f194f9497551c7ba1ec765f6c5ff8197e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130DC 5028 bytes
font_01_sfnt_off000141d7.bin
b1a64ca230e3f8bcddfecf45700bbb56f5ab9b46419ade904091b9ac1d63cba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 12232 bytes

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