PDF malware analysis — malicious · 9dff8a7b17afadca

MALICIOUS

PDF

74.1 KB Created: 2021-07-13 01:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 6dd4fbffa944f9203824fd5d7eeda390 SHA-1: 12977f7af6022637e0c675dfa63209b05c52c0b4 SHA-256: 9dff8a7b17afadcad4ab38091fcfaf572a13923511344a1df2287fb88ddbe998

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://catamma.ru/square?utm_term=sasso%27s+coal+fired+pizza', which is likely used to redirect the user to a phishing or malware-hosting site. No scripts were extracted, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://catamma.ru/square?utm_term=sasso%27s+coal+fired+pizza
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecb8783c961a3b2c5b0986/1626126457073/kekogetigatonanabafu.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecafc174517d3de2171ba1/1626124225752/bitaloket.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7dc95f604029b990de8f/1626111433286/57439251703.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb5a4a9a8dd5e31c85edd/1626125732732/strongholds_in_marriage.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9065bdefa333328a96a6d/1625884251228/5483472382.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb6be7f78e10bf03f4475/1626126015385/99217658268.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecb865db07696a6656d1d3/1626126437268/gilogodiwolidodeditigej.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ec62f229ba2ea8349779/1625877602890/new_reformed_orthodox_order_of_the_golden_dawn.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_off0000c013.bin` `27de8dc86cb9e8315da7fec4e0ea7ff6728f9296dd0063c21609f7339b1107c4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC013	16868 bytes
`font_01_sfnt_off0000ec3c.bin` `6bd14786a6b8a27af127dc8f95f9ea5c4860595ed17a91bf4c8b9fcdca0861b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC3C	10580 bytes
`font_02_sfnt_off00010485.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10485	16792 bytes

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