PDF malware analysis — malicious · 9b0d803d230296fd

MALICIOUS

PDF

75.2 KB Created: 2021-07-13 23:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 406de90e9daaa0db7d4da32bff919475 SHA-1: e729212f6d727ec10b9ba4c361a6389a15262895 SHA-256: 9b0d803d230296fdc83946a0a5bfe356d382ea34088aca088e33d884cce98f33

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded URLs, one of which is associated with a phishing heuristic. The document body is heavily obfuscated, but the presence of external URIs and the ML detection suggest an attempt to deliver a malicious payload or phish the user. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.8872

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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://feedproxy.google.com/~r/sq/ugae/~3/y83TWYo-3DA/square?utm_term=curly+toe+syndrome
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8340e8ad60325f0c9ca8f/1625830414214/tejipusififamegik.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87d3e208af72816bc64ef/1625849150712/31209490674.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d655978cb5ccaaa3918/1626111333537/who_sang_oh_baby_you_got_what_i_need.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e914fedefa333328aa13bd/1625887998170/86947048685.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e88a6926d281541e6e50cb/1625852521514/php_simple_html_dom_parser_composer.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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c6c1.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6C1	16792 bytes
`font_01_sfnt_off0000ded8.bin` `c6cc3e1b1d433749b58ec805c57a20eec1f0551220d4e4f57dbaee86fbff3578`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDED8	10400 bytes
`font_02_sfnt_off0000f673.bin` `36dde6a4563f613aca652671bf4f868c5012a54a346ad0bd73899d5225a080bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF673	16436 bytes

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