Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed6f39cda187849…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 20:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e2412e87c2280cc698001a53b6dc3bf SHA-1: c2b405585af4f216603f57fc0b76f6afdd39c3d7 SHA-256: eed6f39cda187849172afe3e1ba4840a851bb153d21f944761302f47d923a5cb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://kubabus.cz/novy-web/upload/file/55904824207.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/0b6aee8c97b9d3f68d9eab53f9eae360/nojumib.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/bba840296a5eb59f9b792ae5023b111c/basawevezivez.pdf
    • http://x04ydivan.ru/userfiles/file/36452916225.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/52a5d7c5edd0085dbbfa2fe927ddbc6d/diwopuzusezeludupaxupudi.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec37f4c7ef---wunalufidazivepupanadixo.pdf
    • https://vieclamhanoi247.com/upload/files/99997859187.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609de67c2c27a---62803965002.pdf
    • http://arcomproltd.com/userfiles/file/5914732797.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa72c10e20---xapajugadunanazemim.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0919ce6e97de9a6b7cf3ef407540cb87/79211262632.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4984be2c42---53337105357.pdf
    • http://yjsyrj.com/userfiles/file/31801887623.pdf
    • https://ludifrance.fr/userfiles/file/katubujogejalevapega.pdf
    • http://trimblehighalumni.com/clients/84492/File/fajuferumuredonurenok.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c7740aa54f7---40475133822.pdf
    • http://allycatering.com/userfiles/punevunijinipulatufoxo.pdf
    • http://eltonltd.ru/sites/default/files/uploads/gezavosusibomi.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/t0ql1rm645m66sit2g634q6li3/18764247474.pdf
    • http://abnicum.com/files/file/56207985843.pdf
    • http://jshtextile.com/UserFiles/file///pixepiz.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/055a3787c1ae49fb53a0ee68fc9a1740/34943970646.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e16ee746fe6a0dc220b6defffdba4d6e/wavafibasapakofowo.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896add1ca00---zujizojuwenes.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=calves+hurt+after+standing+all+day
    • 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_off0000eed1.bin
39717427d188b0b61d3724a636873b9cf9ec7b14a9e95b42dfa14db17b3e4660
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 10824 bytes
font_01_sfnt_off0001078f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 16792 bytes
font_02_sfnt_off00011fa1.bin
af7765ebdecb717c22dae1d59c3063e187074d4dd09af01447c8d50ea396214a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 17144 bytes