PDF malware analysis — malicious · 6bc7cbf3307237e5

MALICIOUS

PDF

86.7 KB Created: 2021-04-12 21:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bb756f8dd9b6d15cfac7a4d07341f3e4 SHA-1: 7f265c5caef7e9c2b42331b75ceb119e5d4a95a7 SHA-256: 6bc7cbf3307237e57292e07f96f86ed2e7cf7ca73d5bc24432609ecde47af3d4

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://pelibifir.ru/strik?utm_term=barthes+camera+lucida', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

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://pelibifir.ru/strik?utm_term=barthes+camera+lucida
- https://static.s123-cdn-static.com/uploads/4412778/normal_5fce1720c2bea.pdf
- http://options.expert/minitool_partition_wizard_portable_64_bitskois.pdf
- https://cdn-cms.f-static.net/uploads/4408340/normal_6039084a8e147.pdf
- http://myvenza.ru/tunturi_bike_ergometer_manual8qig8.pdf
- http://zumubexupon.22web.org/45189597057.pdf
- http://fresh-ita.fun/kifawakoka46iqf.pdf
- http://gooddevice-online.com/urine_cytology_reportingno05q.pdf
- http://bonifacy.site/72350652318kqvbp.pdf
- https://cdn-cms.f-static.net/uploads/4448743/normal_604cca03e38be.pdf
- http://oyuncuxx.com/84737171769o6d7z.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gumegulaxi/antec_nx200_manual.pdf
- https://s3.amazonaws.com/tamovagag/nirakaguvalululevefuripo.pdf
- https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_58b9f6500f75416bb54c217480fd06f0.pdf?index=true
- https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_62dcc799dcc34fca9b4c832f2241c485.pdf?index=true
- https://s3.amazonaws.com/jumedemimo/vozetaxi.pdf
- http://lujebanamof.epizy.com/chestnut_obstetric_anesthesia.pdf
- http://vukokudu.rf.gd/97704162768.pdf
- http://lerezivopo.rf.gd/hcu_entrance_exam_syllabus_2020.pdf
- https://s3.amazonaws.com/taturi/jaweponunewodusesukazur.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00011522.bin` `46445e4528c9e69fff3d7fa0c65915e5431963ab85c4f384dad95d31afe9caf0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11522	5228 bytes
`font_01_sfnt_off000126bd.bin` `8391bad87087cf929ab1920038292b5c2a2a897fa7a60abecec71e4b1cee0ea1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126BD	10972 bytes

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