PDF malware analysis — malicious · b56f9386f3097f9b

MALICIOUS

PDF

79.4 KB Created: 2021-07-15 11:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 9413b681a7399a32aad0f873f3709419 SHA-1: 3f69ad75495ec2ab6b31e4a9d2f4c5dc8c0a3f59 SHA-256: b56f9386f3097f9b61df59d7ee06ba25d8f0ae853811912aca7faa5ed9977cb7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or social engineering attempt. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to malicious sites. The file's structure and heuristics point towards exploitation for client execution, likely as a result of a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9511

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://feedproxy.google.com/~r/sq/ugae/~3/ZFaGRQ6RLlg/square?utm_term=go+wild+for+a+while
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edf20e36d517042362694f/1626206734187/26804030935.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed89e2f84adf285bf40ea5/1626180067097/young_justice_season_1_episode_2_full_episode.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7cda286d8930991a5ad6a/1625804194252/2749675842.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda4e48525735ba0d2474d/1626186980567/registered_mail_international_tracking.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efd4ba34da7a51e3f2397b/1626330298690/good_answers_to_star_interview_questions.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecfb37cdb2ce13c5211518/1626143543596/what_does_ofc_text_mean.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7cc1b8f757b1ac450d316/1625803803349/zoxub.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efe5f2177a4e2836d2562f/1626334706304/satiromilitalowe.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_off0000d995.bin` `9a7007e6a4ac145555e74557aeb5176d6e469898b4b3598263edcf13305bd431`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD995	15828 bytes
`font_01_sfnt_off00010261.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10261	16792 bytes
`font_02_sfnt_off00011a78.bin` `e4d3b2ce6fdbad0906952a98a8c7391f142fe42d98a51acc6e0329459c3a4e6f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A78	10204 bytes

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