PDF malware analysis — malicious · b9cad5a63ae81cfc

MALICIOUS

PDF

92.5 KB Created: 2021-03-13 23:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b8c5f975c839e3a890ec02f8c20e5572 SHA-1: 50bf2582afce46a9462cbb900b05f7011f078ce0 SHA-256: b9cad5a63ae81cfc2fca2ea6d9a60a92215caa33c467e6f9b48305de6ba2de2b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a further payload. The document body, though heavily obfuscated, suggests a lure related to "balanced scorecard notes pdf". No scripts were extracted, but the presence of PDF-specific heuristics indicates potential exploitation of PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/award?keyword=balanced+scorecard+notes+pdf
- https://cdn-cms.f-static.net/uploads/4451374/normal_6047e04a6e5f4.pdf
- https://static.s123-cdn-static.com/uploads/4449411/normal_5fe57f97301b0.pdf
- https://cdn.sqhk.co/rajunakeb/2KYmkje/icc_cricket_world_cup_live_match_2019.pdf
- https://cdn.sqhk.co/wekaradukuve/GjhzaOW/45735956265.pdf
- https://static.s123-cdn-static.com/uploads/4481821/normal_60076943af7f9.pdf
- http://fitit.space/sukurbyapv.pdf
- https://cdn-cms.f-static.net/uploads/4480905/normal_60451466246c7.pdf
- https://static.s123-cdn-static.com/uploads/4460057/normal_5fe42ebb868ad.pdf
- https://cdn-cms.f-static.net/uploads/4374696/normal_5fd8942fd64e6.pdf
- http://ilook.market/80553124170bno4w.pdf
- https://cdn-cms.f-static.net/uploads/4448113/normal_6016c71f23093.pdf
- https://cdn.sqhk.co/tinolefowi/lhgjcge/efootball_pes_2021_season_update_playstation_4.pdf
- http://retapobu.iblogger.org/regudapo.pdf
- https://cdn.sqhk.co/sebazisop/jjeUhfD/36778754865.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://kunerev.epizy.com/tepejog.pdf
- https://s3.amazonaws.com/zaxawetawupo/80222214594.pdf
- https://s3.amazonaws.com/mejados/68503347422.pdf
- https://s3.amazonaws.com/lerezazo/43393432661.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012cd3.bin` `2e519f9a1e005fa436126c300fd29bf95963936f50e29bb1051dc529428fde1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CD3	5200 bytes
`font_01_sfnt_off00013e8a.bin` `88c93af568de2588df64bebfb0f04d62fb76b2f39c8ef5069349a5899bccc67b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E8A	10968 bytes

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