PDF malware analysis — malicious · b11f07bd72020d76

MALICIOUS

PDF

65.9 KB Created: 2020-12-27 21:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 555fc94285be5cd9a475ec6c6e1afb14 SHA-1: 4db6727248c6f340bda6233bb867d700a206b3d2 SHA-256: b11f07bd72020d76c382f44800e9a16946be031cefb2320ab7cbc03130e08b8d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, trafftec.ru. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'Aashto manual pdf'. The primary attack vector appears to be directing the user to a malicious external resource, consistent with phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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/123?utm_term=aashto+manual+pdf PDF link annotation
- https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/zibop.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466366/normal_5fae3a495a2ed.pdfIn PDF document text
- https://ximewenidurap.weebly.com/uploads/1/3/4/6/134651426/2235822.pdfIn PDF document text
- https://cdn.sqhk.co/ditetona/jglehjL/hat_trick_history_in_cricket.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/fuzafuzeruwit/1126472934.pdfIn PDF document text
- https://s3.amazonaws.com/sukobogixe/python_pygtk_example.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f4a5949d-1031-4118-b55e-be419e7091bf/robamemibesebekapoloboniw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30e5009d-f7ea-4b39-b1aa-505933308656/dalibasevusisobinikivazef.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/mesasekogepum.pdfIn PDF document text
- https://s3.amazonaws.com/bulozor/82590359588.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c68f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC68F	5176 bytes
SHA-256: `ff5b51701d4ed4893b3b26c2755ccf8e28269da3952ceb48dac1ae6bea0abaa2`
`font_01_sfnt_off0000d809.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD809	10336 bytes
SHA-256: `985e059c63f5d05baeda138e161f2089124441608498b7dc979688b3ea18b2c1`

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