PDF malware analysis — malicious · 1fba3648d8ecb85e

MALICIOUS

PDF

82.6 KB Created: 2021-07-22 21:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: a20272ed5c919af790801ddfef33cf36 SHA-1: 2b7d502d939c914e38417bd78342f5ece211147c SHA-256: 1fba3648d8ecb85e7dc0743dc87eecec472e025076559017358a89ab174082f8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'inwebjor.ru', which is likely used for phishing or to download a secondary payload. The presence of PDF-specific heuristics related to external URIs further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://inwebjor.ru/square?utm_term=electric+field+strength+vector
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8ef5efec7cc27b4c5902a/1626926942408/wobetubasarexojubufuvux.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6c84537273346e32a0e3/1626238084464/sajitinudaloxafiv.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee879639b82603386e37c3/1626245014537/5290984621.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee88e63753dc428c8c3993/1626245350886/wexuwinunonodoxeponuxik.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc3c982b498735927044e/1626194889385/5201250445.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f30331b84a576e6cfc393b/1626538801398/meaning_of_elements_of_communication.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec96ba1951226b8b8c8467/1626117818905/riddler_animated_series.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6291d4916b676e5ff0e11/1626745117617/wadexatezosisajibuvo.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2d1c1c5d9e6782cdaf185/1626526145181/pomifitulebekopizabaz.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f5919df8a4e102558fe63d/1626706334048/quick_recovery_images.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f00a82b3de5a36b127268c/1626344066223/19490832400.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f7e18071a51f055545bcde/1626857856219/votoduvuvezefosezos.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f05fd56568f46451970282/1626365909962/bunowuwipejesebop.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f817b4896e5a6c1e37af6c/1626871732795/free_background_removal_without_a_green_screen.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_off0000e28f.bin` `61fba48d54136754d07b09d09f784740127a59fa5549ec9f0e5a9f636fb1db50`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE28F	16088 bytes
`font_01_sfnt_off00010c19.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C19	16792 bytes
`font_02_sfnt_off00012430.bin` `3fcb24cc02375a059db41b0598647d1511447ccfb9e48e503c59cd48b2b2db1a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12430	10640 bytes

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