Malicious PDF — malware analysis report

Static analysis result for SHA-256 406dc06d1734522c…

MALICIOUS

PDF

67.1 KB Created: 2021-09-08 07:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 885ce036de3eecf34a91cf3c3230b7a4 SHA-1: d5a669c14a4d0b7c9bbb442d6ecf8e1eecdf8b71 SHA-256: 406dc06d1734522c918d7bb62e6a12f20335a238c58da071d7975cac4a9d3bb0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV, indicating it's a Pdf.Phishing.Trojan. Static analysis reveals multiple heuristics related to PDF link farms and external URIs, suggesting the document's purpose is to redirect users to potentially compromised or malicious websites. The presence of numerous links, some pointing to IP addresses and others to compromised CMS uploads, reinforces the attack pattern of a link farm designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://alhurwallpaper.com/Files/files/85327634490.pdf
    • https://intellicapital.in/ckfinder/userfiles/files/nuvekuderadesiviz.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946c1541037---genukukigutugoburelomot.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97bb041200---89559203706.pdf
    • http://bjjiffy.com/upload/63858452932.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bce46807---2795060084.pdf
    • https://adasms.fr/userfiles/file/mewotiwilafogurinisenater.pdf
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/xoginopizeze.pdf
    • http://sjhrz.com/images/upload/File/xajironak.pdf
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/valigijukorozi.pdf
    • http://ajk-opakowania.eu/upload/fck/file/36408697438.pdf
    • http://140.121.125.49/ckfinder/userfiles/files/20210826_111334.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xizutidepiwexirorale.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086a60cacbe---sozulokesukuti.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d39d418e7---xefufiv.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e717dbc2e5578c4c0c35de647448193c/99819135945.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/68300958679.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/61a4bfd16c82136cdd3abf080372eb0c/32062994703.pdf
    • https://sport-jicin.cz/dokumenty/raputegevisovifefanananu.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9d55051331---biwaluna.pdf
    • https://readandenjoy.ae/userfiles/files/11681592856.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2425a04ecb---20815290541.pdf
    • http://wpchkg.com/upload/image/file/zoxawinosojaxufixerukox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=trends+of+the+periodic+table+worksheet+part+2+answer+key
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce61.bin
4b4f90ddb1dbbb91dc0d4d0d239bd2c745d5b73ee8eea3c12af96db44b4753bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE61 11232 bytes
font_01_sfnt_off0000e88e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 16792 bytes

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