Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77c7c9dfd168c7b…

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 17:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b59c180705d47fc7beace9f791c07a77 SHA-1: 1d3487ca9673ea1725d3b054205d0610efa3dc9c SHA-256: d77c7c9dfd168c7b0a02fe16a4338013dcb99b74ce0d8525f8b22f5ab50462bf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The presence of multiple links to compromised WordPress upload directories and the 'SE_CALLBACK_LURE' heuristic suggest a phishing attempt, likely to trick users into visiting a malicious site or making a fraudulent call. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=one+dirham+in+indian+rupees+today
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607add1830d24---pujawukolulupopawojoxiz.pdf
    • http://imaginove.eu/data/Files/wazutunomeledutanebosef.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/68880842162.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160786383b0a58---53551742096.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e2e8246b9---wusobutelusadetifizati.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d83ae63932a---49131868814.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4e0e2873---xureriro.pdf
    • http://boathousebrokerage.com/userfiles/file/wufaxipef.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160875ef663916---keposarofivuxi.pdf
    • http://fritz-fahrlaender.ch/download/peginofo.pdf
    • http://lubrifianti-auto.ro/files/file/71648831758.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2676ca595---lojerinetefanuvimirabivu.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/27687575037.pdf
    • http://beijingxinzhi.com/userfiles/file/20210510032940_99880036.pdf
    • http://datev.hu/ckfinder/userfiles/files/46744117000.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/jubidodis.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/wapedipalejogazegag.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac2c82419---dulesapoto.pdf
    • https://workinhotel.com/upload/fckfile/88025211148.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b3f4b588a---maxagajopivimizudametevis.pdf
    • http://18554080.com/userfiles/file/xotifikikafoju.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/l9ce01vqfq3qe5o21gl6rtqao0/71095882679.pdf
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jaranomanawetol.pdf
    • https://gbagencement.fr/uploads/file/deradorokaweliwedefeju.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe7.bin
998a90212eef78c93f957ad38e16e2b738ebe213adf6ae726b1daa96da574476		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE7 16248 bytes
font_01_sfnt_off0001064c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 16792 bytes
font_02_sfnt_off00011e5d.bin
cb22297cb345efa2b973a5529f7d34f362c2fa401ecec879e64cb16b1dda6a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 16300 bytes
font_03_sfnt_off00013480.bin
9a7dd2b31937502e97e6ef91396faed3fe4cf0c6b358888278523b1541841849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13480 10848 bytes

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