Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c01dcf31b28e82…

MALICIOUS

PDF

101.6 KB Created: 2021-06-30 03:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4caecdcdef256c36af82cb84e101ff9 SHA-1: 98d8508f1508e993b74828cdfa75791adfbe9a7b SHA-256: c7c01dcf31b28e82794841635e4aa48b78d7ef9902a4e6d17e25728540306502
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be redirecting users to external content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • 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
  • 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://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089462482c05---29194048458.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f09b805c1---gisowulijoripekedesule.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c15b34b2bbcf416ccc0b136368a09f13/69961652030.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afeb1081c91---tibujopegikakowovolado.pdf
    • http://statewideroadservices.com/clients/879378/File/tukokopatabewowagisijeduv.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/97bba2634993b6b1c0b065d01d6657a3/tajagekuzebulule.pdf
    • http://sattamatkapatti.com/userfiles/file/lopukerej.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0370c18f5---96912830315.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa831eed59d---jofogamikiletoxuzugim.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/55904997280.pdf
    • http://reutlinger.pl/userfiles/file/57368061461.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/67eaf268b14269909b99ce17fc9f386f/bilipibekekew.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/ce5df0ec4dabad8e41fecadf7b49ef6b/10451308414.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/566d13e6b197c23b73508e61990a7271/28949949949.pdf
    • http://voijin.com/userfiles/files/direfurifupifexidozi.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8acf2cc7af---bidifaguvefefolez.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16096515be9334---mejagosisezofidejemixen.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3cef82604---81218884656.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2bc3dc247---xofekesu.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d7b0bda1b8d13b6b1fdb56b10bcee6f9/nogosadijobizitemaje.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/fdf044pqfq6o57ld5sbchc22q1/24572497463.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25ea5e1e0f---72942184278.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/k243eu3urednetc0a9b2qir6e6/tosuvutobobaxepawamed.pdf
    • http://mtecommerce.it/public/news/file/puxotavomiladovomofe.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/68d493b2fd5fd3a8d3bf3a9c411b8038/navogalawalikegafij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=clash+of+clans+hacked+version
    • 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_off00012a2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2B 16792 bytes
font_01_sfnt_off00014242.bin
bd152a4316b26f49d53322b00c0abc0bb0de3bf4011aa401878aeefa886a3a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14242 10664 bytes
font_02_sfnt_off00015aa3.bin
bc43bc9072148de3ce740424e73eee94eb850a6e5bc0e2f5d89694f5a993dc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA3 17640 bytes

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