PDF malware analysis — malicious · c7138e45b2a3f398

MALICIOUS

PDF

76.2 KB Created: 2020-12-18 02:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 6217fcd8dec70507b0222c0c5bf6fc9d SHA-1: 991eaa00a838b17710096c02f1aa5764e003f683 SHA-256: c7138e45b2a3f398f902cfc931daf704d9c74da21991c8a3b84ed4d7268e115c

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a textbook, further supporting a phishing or social engineering attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=drive+right+textbook+2010+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4420604/normal_5fbf51cb7fb7c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378171/normal_5fdaed9d38c89.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450154/normal_5fd657a630d22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425227/normal_5f9c06299a2b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377391/normal_5fad8a7b90050.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419820/normal_5fd81f80c1a9b.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/putelekireza/xupefepugugomoj.pdfIn PDF document text
- https://s3.amazonaws.com/rabewiruzitewa/namoginitegemake.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cfcc363e-f306-48e3-a4f4-99d32b79301c/the_sleuth_kit_commands.pdfIn PDF document text
- https://s3.amazonaws.com/xabalaru/optics_hecht_5th_edition_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/vawoginele/elementary_algebra_study_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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dede.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEDE	5540 bytes
SHA-256: `7367132fac25df75c1446f7611ef8fe40cc2a7ddaf5ac12f2e2c9e6fc5b60d94`
`font_01_sfnt_off0000f1cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1CF	16300 bytes
SHA-256: `25a1d06f9b97b5292a96402dcabf87662bc335827092e02be9d733c159b45d35`

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