Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2ea59f422cea63…

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 17:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a5298e85286bb7fff156e1e8f2ab589 SHA-1: 7f35a5756cbaea429296b6589cb08b66b2b41fc4 SHA-256: 0e2ea59f422cea63787e6f9e033567593b0b95600948dbe37070b173bd2aab4f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://ketchas.ru/uplcv?utm_term=how+to+make+all+tnt+in+minecraft
    • http://lapawan15.com/shop/fck_file/file/47334831174.pdf
    • https://repare-ton-smartphone.com/userfiles/file/43253191324.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608b630b72b98---neraretadewokozulev.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447a5080c6---wosijus.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/uv352sb3e6s59n08ml4k2mrv93/29463435878.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fff7588bc---36272626568.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/2nj6p69fqfumb0hh2pfnvgnun9/xozorebo.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e285e600d53b98865571bbe72555404/japitilipenonizos.pdf
    • http://adamlegal.com/userfiles/file/lagul.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/bdc10c06f495361931524001f4020492/pawawusewove.pdf
    • http://satisfytech.com/ck/upload/files/87622562894.pdf
    • http://arohitourandtravels.com/userfiles/file/85674553673.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acae137c8cf---49981878111.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/021bdf2a1cf53112ec40d67a065ebc2c/10495231715.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160739871b77f0---sinafon.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/62146719980.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a46ced401---3326944945.pdf
    • http://ufnk.fr/app/webroot/files/file/1881812703.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/780409c3ecbe5d239a897da6eb4776f3/95249877075.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607299304b878---31864198963.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/ac32e604c802dc839539d20e6e13ef07/36844316629.pdf
    • http://formel1vermietung.de/userfiles/file/10971773681.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7644fa3ba783eb46a4bba08339205b40/jarizuzigolawatowu.pdf
    • http://afghansolar.com/userfiles/file/42912645975.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7f.bin
8689548fdec951dac3e4c85d1564ca71cd4b7fca32dddda3e7395a7cfbdaa02a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 16624 bytes
font_01_sfnt_off000117ae.bin
813e1fb0726223cb0d234eb54545d1c062ff72297f84844c0d0018652dc4023a
pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 10500 bytes
font_02_sfnt_off00012f85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F85 16792 bytes