Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5c3bc5f8029f9d…

MALICIOUS

PDF

90.2 KB Created: 2021-07-29 09:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1a8657bb733c6b8e0ace7139c54450b4 SHA-1: 3d1663a3a7c402dcbd3c38471a85bcef843043e8 SHA-256: eb5c3bc5f8029f9d10dbb6e86ad2d10530f1e94bbb03c46f20d1b3a206e09bde
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised domains and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple malicious URLs is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608163ad2639e---sijab.pdf In PDF document text
    • https://hssanesteban.cl/files/tejubakapopufa.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/7ff47e6581cf16b6211fa9d024a099b7/biwepuzinenudif.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/40807705390.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/nojekumireb.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/bozasukogijuziwarikifulum.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a6ac9ae98---kadotanolemokagawipop.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/f08fdbce3b8c3a23193acf2c5412c8bb/pokaninofotidem.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092cd082b773---10728331429.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/92398744325.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cce0lb6hhja2ba7ss72j4vmjt3/79942417187.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/48525481578.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efff9999c9---34384686737.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74f718527c---bikinupeseve.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16086a91160d34---tuwosototav.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/92045447282.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/wijoforivisu.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/94682444275.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/1c02388f3f2ce475a12b4d8d69b43130/fulabeke.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/noruxepebobaseretujuliket.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/fbm5d5vma2qkka1nk2743oevot/21538146801.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23288248869.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/9dbcbf8494475595757ed43388cabf5a/rejipaw.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/i3l7e378td7i86lq9ukphj772p/18101944658.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/64560948129.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/p4210ffn4g9rsq7h7n001f9r32/punixidaruvawev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=rewriting+sentences+exercises+with+answers+pdfPDF link annotation
    • 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_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 18040 bytes
SHA-256: 18ec7aa09435de58dae5283b5190de611d041816fb417cd590afdd11e2bcad3a
font_01_sfnt_off00012954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001416b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416B 10968 bytes
SHA-256: 29389df14906808a68d8181c4f5e80a915769f1b88f85eaa43eed5e2dd6d0950