Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0c06c7deeebf5a…

MALICIOUS

PDF

88.0 KB Created: 2021-06-29 23:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce2752644434752566bbff915ed3b128 SHA-1: 94eb55f2c2e50bbd03a2ccbad4f242851f288bda SHA-256: ee0c06c7deeebf5a03a0343639e8f36d45c4e28724b8c5de4156d3b57ea1b266
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 vulnerabilities or contains malicious links. The heuristics reveal it functions as a link farm, directing users to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO manipulation scheme. The embedded URLs, while numerous, do not form a coherent narrative, but their association with compromised sites points to a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://angarakshaksecurity.com/userfiles/file/togarokonipidisatutalo.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ba1f2ed06e55c04bc551986ed3a43f94/97273470803.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/46837206190.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/nnk1au40b3a4fp0253jdqlk0c2/suguwipevemag.pdf
    • http://aj-logistics.com/stock/userfiles/file/30651419744.pdf
    • https://austdoorcaocap.com/upload/files/pejuw.pdf
    • http://yuemeism.com/uploadfiles/files/43565781794.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/692c17d840d27c3c46303b44dfaa8318/2156971513.pdf
    • https://masihpt1.com/contents//files/fapexetorazatukepurez.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfdc1aaa18---tisupikunazebirasen.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/15820626673.pdf
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/sotaje.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077a00018917---dezilelom.pdf
    • http://alarcon-v.com/editor_upload_image/file/82980100435.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/nekorixilijefilidadofit.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5bba9720c---76306625466.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/f36bd3da75047ce24c4debd2618d5628/14043913478.pdf
    • http://www.medicellbank.com/userfiles/files/81082606385.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609698ab8bdad---buxunabex.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078efbfb6ced---zazapijivodunomebadowod.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/649b1f71efe897bb570b666931a3d837/32670547954.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083e1d783202---fatidoxuwatigurezetur.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e69c6b0bae---479815250.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e8b365786---84597416938.pdf
    • http://laweasy.kr/userfiles/file/15974429692.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160786618ca5e4---70026265990.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chemistry+bsc+1st+year+notes
    • 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_off0000f309.bin
c15bc8305c8ebeb92facd48b77cf565ed286329b3ac107c3627288598bc9495c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 17816 bytes
font_01_sfnt_off000121d1.bin
67485ea371852e3f9c0f8f468606df513a98cf6e3c2c3e5c44ab4944f60ebcaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x121D1 10784 bytes
font_02_sfnt_off00013a9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9A 16792 bytes