PDF malware analysis — malicious · 4ac5a51041bbc08f

MALICIOUS

PDF

81.5 KB Created: 2020-11-24 09:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 425db6c7479e525d87672d840cc2d1c4 SHA-1: 5de6b13d3a46d23d1126ddfa3f405fa8cea5bb00 SHA-256: 4ac5a51041bbc08fdf6ac20a22e0f3f18619088c3254429438adc3ee6279e9ba

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 URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text that could be interpreted as a lure for the user to click the embedded link.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=compass+rule+adjustment+example
- https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6883937.pdf
- https://biwefixosepow.weebly.com/uploads/1/3/4/3/134334309/mariwuzufozurawejez.pdf
- https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/89224f552c.pdf
- https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/digolekuweguvor.pdf
- https://bufibefoxoxopij.weebly.com/uploads/1/3/4/4/134489975/5130379.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/muxozuvalubi/88443865500.pdf
- https://s3.amazonaws.com/dewazewokib/perl_reverse_shell_cheat_sheet.pdf
- https://uploads.strikinglycdn.com/files/c7ab8a3d-4917-4f9a-af05-5a5bae115ec2/81021689776.pdf
- https://uploads.strikinglycdn.com/files/7683abe6-065e-4903-8246-052672f63d7c/50854406924.pdf
- https://uploads.strikinglycdn.com/files/b0624720-1ef9-41ef-b962-8c8e2cfd1169/jufobupepemakuzerug.pdf
- https://s3.amazonaws.com/vawoginele/63856208052.pdf
- https://uploads.strikinglycdn.com/files/1e024c1c-80a7-4f99-b884-1ea2d59f9567/25399161299.pdf
- https://uploads.strikinglycdn.com/files/ead2d9b1-99fc-4d6d-9bb8-956015e7df3c/61270324303.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8f7.bin` `49f2e5cc21e2aa1c99b6545f343dcb537fc8236d362b0796fde605ac8837afb3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8F7	5104 bytes
`font_01_sfnt_off0000fa41.bin` `f747e3688a7523d27d5763b3a4c92d578a6936b92edbb56501e487456266420a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA41	15584 bytes
`font_02_sfnt_off00012ad3.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AD3	4324 bytes

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