Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eb298394d02b3f…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 05:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a270cd76524f90fcc3ada2044238abf SHA-1: de3da1eeb1c202483e767cfafecf94c39d465b13 SHA-256: e2eb298394d02b3fd270b5f1c7b34ed7d9248543fbcfa35291d587f9339aa093
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, pointing to numerous compromised CMS upload locations. The embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://ajtoablakcentrum.com/_user/file/65343071397.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1a8bdb408dd98d0972ffa314edbe1615/23534733239.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a715a7081d37924a9e9cf2b4f72313e9/39688456674.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab22ca24a35---85725826793.pdf
    • https://diedacorporation.net/freesiafiles/file/38474624325.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b346963bfcd---50851692530.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48690bf662---gofetu.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760e3a81370---48321113768.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/833197eb3ac6f52b27e5859ccaba49eb/merazidegajavowizefawe.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608722ab47082---digog.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/34828900204.pdf
    • http://dienlanhlongan.com/upload/files/93000823385.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pakaw.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/9cdd02d4a78ab6b6086d3189474dce07/1924164582.pdf
    • http://kppzp.pl/userfiles/file/logegepavedamovukow.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fe2e0389e---42555552752.pdf
    • https://panama4d.com/contents//files/fuwuxenevewuduwipotewo.pdf
    • https://protradingindia.net/userfiles/file/91632143787.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092a6f06e1c8---40393119539.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e3f0c2c0ea806d77096e4df8d5ca1776/pebulutevetapu.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d60c376cb8---wuripegobakasepozimoxog.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e6b1bce5---37143212680.pdf
    • http://kxnjl.com/userfiles/files/vedowesewagupukejiliwetur.pdf
    • https://ancoraeducacion.com/images/redasiwonuvid.pdf
    • http://erdivigado.hu/userkepek/file/xunojiwowivizofuzojofules.pdf
    • http://brilspa.ro/userfiles/file///48449090768.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=natural+moral+law+definition
    • 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_off0000eeee.bin
40179f6d744dea118b3b2fe2a79b4630c11d3bea33f4107cfd991dec1eb219ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 10512 bytes
font_01_sfnt_off000106db.bin
3b605898b6d93d65787b54d6d9bb2733050e3e805947b43a390d681372d49c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x106DB 17132 bytes
font_02_sfnt_off00013382.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13382 16792 bytes