Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00e693d888ecd0b…

MALICIOUS

PDF

67.5 KB Created: 2021-09-29 00:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f22c2eb478906163564f67a8946cfd67 SHA-1: b7509f2e958e7ca6545591764db85230aaafa2fb SHA-256: b00e693d888ecd0bf5091cc033bfd20af474653739317f9be2a48f7b13a62b41
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only document with a clickable action, typical for tricking users into navigating to an external URL. The presence of numerous embedded URLs, many pointing to disposable domains, further supports its use in a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://alcantara.cz/data/file/balapolifexexigibavegivaf.pdf
    • http://bancodevida.com/bancodevida/admin/images/image/file/88981081119.pdf
    • http://iscelenie.info/files/file/5038328943.pdf
    • https://guptajimarriagebureau.com/userfiles/file/62374779625.pdf
    • http://grgct.com/ckfinder/userfiles/files/kutas.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b0da29f27d52c1223808353d01fc0af6/65295555715.pdf
    • http://www.jindatunnel.com/up_files/file/xenivamegazel.pdf
    • http://redskap.ru/userfiles/file/walijokisekunopuforam.pdf
    • https://kompaspt2.com/contents/files/47044246831.pdf
    • https://krantiservice.com/ckfinder/userfiles/files/12284200148.pdf
    • https://rmp-traueranzeigen.de/cms/files/32707893867.pdf
    • http://dainichiji.com/upload_ckr/files/77498914363.pdf
    • https://laurallo.com/ckfinder/userfiles/files/29492672440.pdf
    • https://hongming-eco.com/userfiles/file/97476688670.pdf
    • https://avistravel.ro/userfiles/file/35853745154.pdf
    • http://klubbelgickychobrov.sk/editor_uploads/files/77458447363.pdf
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/livijizelobunusujubow.pdf
    • https://pima-alarms.rs/slicice/file/95241187394.pdf
    • http://schodylux.pl/userfiles/file/rakitaxobef.pdf
    • http://letsfinal.com/userfiles/file/suxoxu.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/09bbe33d65f9f01ae41068cc6b3f6786/87702246861.pdf
    • http://indianmailbox.com/assets/images/userfiles/files/25768358939.pdf
    • http://hcstonetw.com/uploads/files/202109230455199226.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/junusinupov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=files+on+my+phone
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000ae26.bin
dd93bf6c3f9b1b5304127803ccfcfb20dbf32d8f959bd5f0204fffe93012a002		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE26 10248 bytes
font_01_sfnt_off0000c4e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E7 16792 bytes
font_02_sfnt_off0000dcf9.bin
64aa6223a3a7ae343d34aa8ffcdd9776bb7e37f913130643a7d27ff5fbaff49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 14312 bytes

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