PDF malware analysis — malicious · 852c12e12b8c0ae7

MALICIOUS

PDF

76.9 KB Created: 2021-07-18 22:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 4b5dc4850f3749bbc453003905da8b60 SHA-1: 366c5ef9b099333f75adeb4d2199d4c05652e768 SHA-256: 852c12e12b8c0ae754d0d3dfc9578b384e84fa69fc73c8ac6872891fba233270

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains heuristics indicating a visual download button and instructions for a password-protected archive, suggesting a lure to download a payload. The embedded URLs, while mostly benign, are part of the overall deceptive presentation.

Machine Learning

Nyx PDF Classifier malicious score 0.9125

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/nCRFBnYrBHY/square?utm_term=ppsspp+gta+san+andreas+file
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e82d4e4261ba798064770d/1625828686428/how_to_convert_two_pictures_into_one.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec85d3c268f363b086fd6e/1626113491414/baxiporajakofapus.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f206de72a6757b3ff6173d/1626474206624/medications_to_treat_neuropathic_pain.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0a75cb32fb3777072dcdd/1626384220249/lifelines_of_national_economy_class_10_solutions.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f13f4c5422dc4ac5c6ea3c/1626423116529/lerapez.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_off0000cb2e.bin` `3794df260110149fdf0a9b73cae1a2b477881dc6eff818568051032cde936077`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB2E	16964 bytes
`font_01_sfnt_off0000f794.bin` `9341a46e6272bbe563604993f7f39a7f1f9ffb59783c28d0b3e62162f2c2e9cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF794	10552 bytes
`font_02_sfnt_off00010f86.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F86	16792 bytes

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