Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3017ab2603a9775…

MALICIOUS

PDF

77.8 KB Created: 2021-09-06 06:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bf61aea40ae5e6fbc50d6641bec45463 SHA-1: 093997e244e1ffc9b1d968c97c49d6f49d8c32e7 SHA-256: e3017ab2603a9775ba87aa8b9dffed04d37ad8d920e55b13dfdfb86a7f54cd50
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are highly indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=bhagya+suktam+malayalam+meaning+pdf PDF link annotation
    • https://psychotherapie-coeppicus.ch/userfiles/files/45707658545.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f504cef9e---26055136914.pdfIn PDF document text
    • https://rinducm1.com/contents/files/6099154353.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/d7ec2f6fe817e667ba7daa91b9b3a5c7/gesibebifogibinemupa.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/webekigowimalemulem.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/negigevefizumape.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/53947248678.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/98632510557.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/fakujapifukivavogef.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/61f509c3e8bcd3413c70b08e426bbfc0/76590080618.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/79732685372.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f814ece25---67699102259.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67e9f0952c---33833297917.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/84512315795.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6dkb5pej1kuk5gq8k9r43gt8o6/457983893.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/tadulomakugaluxaxa.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/21163665614.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/2599519738.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/5524690963.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/71477439398.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/6e168492a3766c7905755e56d7c548b7/mewosuwuvisupej.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/75850542865.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 20360 bytes
SHA-256: d90bc0d32cbdb8ae9515060b2e8b8c84a2b5ed4e742b44fdf2b8c1fd64d1fb0f
font_02_sfnt_off00010e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 11084 bytes
SHA-256: 4bedd8ff924360215b37ddbb6c313f83210a316c987a2d8db7a3182059ff6da3

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