Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9456b21773628d…

MALICIOUS

PDF

95.6 KB Created: 2021-06-26 15:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49e10c0dd62a9cb95eab40dac9188484 SHA-1: 879bc0ed9e5fb95bb45fc713fb9fa4409b0e2f39 SHA-256: 0c9456b21773628d28c0723602e83dcf34a40fac654a4c9bbe99ab7913a4c398
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 it likely exploits a vulnerability or attempts to trick the user. The file functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of multiple links on disposable hosting and the use of UTM parameters further support a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0cc26637---pigerevowe.pdf
    • https://duproject.com/uploadEditor/files/buzivufipedo.pdf
    • https://najlepsze-w-polsce.pl/uploads/93143428686.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d91e10cb0b---nimota.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cc92b5b23---23191626470.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b35367192---37468333238.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/64048cf7a362798358472288bfc8215d/wovin.pdf
    • http://desagresbrts.com/clients/34568/File/rinegugopulifofuzomoz.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/05ebf000b84217909e350ccbcac5d7d2/firatedix.pdf
    • http://bettynblue.com/upload/fck_img/20210623/file/ratedexitir.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078401f2449f---lanafowozifibazupijo.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd05090fb83---63221327105.pdf
    • https://acrgroup.nl/userfiles/file/losamalutulazimevitok.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16091ca8c251b2---bosajixin.pdf
    • http://zulassungsservice4you.de/bilder/file/jupojiseguxuposetedaginu.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/88836771ed06fd8beb2b7d0c7cb75c64/8084568512.pdf
    • http://geologocarmignani.com/userfiles/files/tixomugobuv.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/ae8e58d322e380bb00946ab29e3ab0e8/seroresulajivetuzo.pdf
    • https://chmelo.hu/sites/default/files/file/71088767098.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702fe6c28a3---22801238399.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/muqbn2ct93jednlo6nne848ek9/32459891474.pdf
    • http://mrbossamktown.com/uploads/files/91455603292.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e00864f45c---wupegagofuforijuwovek.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c706e51da3---jaxupozo.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a5e967bcc8783ec89d1ee0111cc6d15d/50793169397.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pantropical+spotted+dolphin
    • 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_off000112e7.bin
7100ad88a4a191cbccd11ea2e3fcba67638dd27d894f70a41fba87df046c710a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 10612 bytes
font_01_sfnt_off00012b0d.bin
38bbaaceac421e83272ca60878af3647422beffb76cdcfcb9a2732e5117166d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0D 17420 bytes
font_02_sfnt_off000158ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158ED 16792 bytes

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