Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cadf0662814e98…

MALICIOUS

PDF

72.0 KB Created: 2021-06-10 10:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7762725f33bf1fd15cec40e10be70e10 SHA-1: 9542af0eb736de4a629da4b21d7969bd0332592d SHA-256: 19cadf0662814e9803902c5e58af9837740e58699cbadcc146d9641bd2ebcfef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=watch+yeto+vellipoyindi+manasu+full+movie+online+megavideo PDF link annotation
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607472734c1a0---wajadigupawukalininulop.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4b465c2b---32792190590.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/1mm5bb34rq5moovurpt6tn9j92/97772417346.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160789c55e3e1c---kadejijomusugirolumugez.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6c5807ad1ac24964d286282dd88195ed/tipujivo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac47d2e4619---loropekemawiwo.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974e458be15---7023598973.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce61ceea4e---79797530150.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/50415089949.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/gubitexuwe.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/96072294650.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/85525034097.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/94554628386.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/hmqcgfb3h2hqhud5gdhppa7097/jinagod.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096680f3d29d---mofazivesones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 5648 bytes
SHA-256: e55e257b0d6ff2476e90219a142a6ba1a380f468ece20bbb8566227730093544

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