PDF malware analysis — malicious · d4dc77581e4fdc66

MALICIOUS

PDF

79.2 KB Created: 2021-07-13 17:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 4f0ee200b374f730c28823c0aa84ad54 SHA-1: f6d6455f0f456518c35e4c1a04d42596f743b91e SHA-256: d4dc77581e4fdc66e0d7e66d752b1ab87c191019dfc9e3292ded3c96bbf6869f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that lead to external websites, as indicated by the PDF_URI and EMBEDDED_URL heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving redirection to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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/~3/0YvHz_IItD0/square?utm_term=alexander+gould+how+to+eat+fried+worms
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9eaa93ea6d7f6ef6089f/1626185386938/tuvitubavazawewapazesiv.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed8d473b21860fe672db8c/1626180935834/jasaxanagakozaka.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e935ec2a6f785f58350c4a/1625896428509/62198520830.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca7459cb57f380a7b08ba/1626122053556/the_5_psychological_perspectives.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77d6868387303f3a098d1/1625783656655/how_many_gx_cards_are_allowed_in_a_deck.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9f1a54e5b71ae84e55fe/1626185498561/xalekajaxibisu.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8b7eafe2317389cecb5ec/1625864170769/liwedorefuvilopidugaz.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e3c8c14ff043cd597d01/1625875400252/how_to_save_a_webpage_as_in_mobile.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_off0000d1ea.bin` `4ddeff3ced726a5708a8b2bbf0cefe024b3ab633d779f19890001d984b37fc10`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1EA	11072 bytes
`font_01_sfnt_off0000eb5d.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB5D	16792 bytes
`font_02_sfnt_off0001036f.bin` `5a8235b977765ffd71952930f3ae3451631a344f05b73c400243b83bc6d9fd9e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036F	17104 bytes

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