Malicious PDF — malware analysis report

Static analysis result for SHA-256 028e8666f28f97fd…

MALICIOUS

PDF

69.8 KB Created: 2020-12-04 20:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2b7e67130262ad8861ea0419419a62eb SHA-1: 2987be05a7daa130bc16eba0742b9f24f3e3655d SHA-256: 028e8666f28f97fd2dee14c8509e52d6885b6032ec31a22a0f587b9dd1e671e4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URL that leads to a suspicious domain, likely used for phishing or to download further malicious content. The document body, though partially corrupted, contains text related to 'M416 trailer dimensions' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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://trafficel.ru/123?utm_term=m416+trailer+dimensions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5fa34bfbe7fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_5fbc75a4a64a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f9f05495b31f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5fa660c74a4ea.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/5fc0cf44e5c7695ca99b2c1d/t/5fc14e631972c46e3ccf1e4f/1606504036744/13916880541.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/autobots_return_transformers_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/zuvefabiritoxajevala.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/riboxirumejaveso.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/crusader_kings_deus_vult_strategy_guide.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_off0000d149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD149 5268 bytes
SHA-256: 60e06f48c7bc19c7471494b6ecbf293226bd25d4796a633ab8167f358ca7e646
font_01_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 11536 bytes
SHA-256: 186d28c53e4dda2c484e97568694b9bbdefa5a5cc4ed6858845ad27ee3df08cc

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