PDF malware analysis — malicious · 0c0133c29a1bf876

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 21:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 207358ef87b36a3b20fe8c4eb414f3c6 SHA-1: 5258ada6c43b6688d6bb250fd12f2764cfba55ee SHA-256: 0c0133c29a1bf876e58766df88f6c413cb755bbc60af31a51a0a5625627b4599

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'fundamentals of computer engineering pdf'. The primary IOC is the external URI used in the phishing 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://xezojetit.ru/award?keyword=fundamentals+of+computer+engineering+pdf
- http://kazotapojiwi.mywebcommunity.org/what_is_the_easiest_way_to_learn_russian.pdf
- https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/edde2f43.pdf
- https://lasirobazu.weebly.com/uploads/1/3/4/3/134399905/vumerafomo_muwufomo_bedup.pdf
- http://lajulufubugo.22web.org/19160865241.pdf
- https://rugexivik.weebly.com/uploads/1/3/1/0/131070765/9c77fbec.pdf
- https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/8802229.pdf
- http://zosexurotatogek.iblogger.org/91036380338.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://fiwukum.rf.gd/agendas_2020_personalizadas_gratis.pdf
- http://fusozevukatamir.atwebpages.com/dajimubiviwapari.pdf
- https://uploads.strikinglycdn.com/files/5d9e9e64-b792-488e-8242-5951eeda3c57/janupujabosurafi.pdf
- https://uploads.strikinglycdn.com/files/1079805d-ca33-4434-8125-1887735bcd0a/82197881459.pdf
- http://manosotidokef.myartsonline.com/60892771146.pdf
- http://momejawepafad.epizy.com/92661395168.pdf
- http://kegogoxuxupi.rf.gd/33445944587.pdf
- https://s3.amazonaws.com/pesetufavo/xanekig.pdf
- http://munakazoxan.epizy.com/18113882053.pdf
- http://gixopesibesuges.epizy.com/75688442104.pdf
- http://fugovolit.rf.gd/bookworm_game_for_pc_free.pdf
- https://s3.amazonaws.com/vuraradaso/30857227695.pdf
- http://puwojewemuxa.epizy.com/43382614851.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_off0000fb64.bin` `e4745f1609ca21b8bee83003cb8eb30c13a10e6d45cdd90c84938ecca3a4a2ae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB64	5432 bytes
`font_01_sfnt_off00010dcb.bin` `320550f9f3db678478a77cc7bc6231db01991d0b6d9dcc89a5532dc05e059735`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DCB	10256 bytes

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