Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2dcc93d58db7b6…

MALICIOUS

PDF

89.3 KB Created: 2021-07-17 20:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d8025e3f6f5926bbbd3c8711638ba4b SHA-1: 0cb87bdfd43f1e0e02c38022f2ac0b7485c2ab86 SHA-256: 1c2dcc93d58db7b650b2c41349972b585690302a6787bc1fba28c0cefbf3c07a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a8e646967---53815972462.pdf
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/98271340374.pdf
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/nuwubezukipaleki.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3731b05cadce60f5d1c89f30855c8d15/tibiniwutiwafebo.pdf
    • http://live-net.it/file/mafedisira.pdf
    • https://guijek.com/userfiles/file/50852529713.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/vijusov.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073552f8f56e---49156241631.pdf
    • https://groupburuemas1.com/contents//files/2369794870.pdf
    • http://al-bandak.com/userfiles/file/27679659185.pdf
    • http://footstepfloor.com/upfiles/files/sonakipozedofakoravodofun.pdf
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/duwoluf.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/mjujf2n37bg8c9l4lavaui7o6b/82314999915.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6dcf39c0---87019434798.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb759e5ced---vulanelireliretoge.pdf
    • http://incucinaconalberta.com/userfiles/files/80728411268.pdf
    • https://kibledergisi.net/resimler/files/pisaxo.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609427c5a9c06---51820458923.pdf
    • https://bselink.com/userfiles/file/23223006122.pdf
    • http://capmar.eu/userfiles/file/35460165165.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e33441ca0---garuriwepinim.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/99b887a1e9afdeb9b45889e568a60513/67610479507.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a6f8c8a0---lutavirozo.pdf
    • http://mastera-mix.ru/ckfinder/userfiles/files/pamajesatuga.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816e3f516dd---wipaduladupabakibaniginus.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd35ad971---kibukuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=annotated+bibliography+example+with+multiple+sources
    • 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_off0000f8c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 16792 bytes
font_01_sfnt_off000110da.bin
d0dcea3c93b137a69a59f17f0b43e254a96847f33ab04d6c9576e494bec6dce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x110DA 11484 bytes
font_02_sfnt_off00012b86.bin
f3292ab3cfe99f223f192b80d399c076c29e052bec77c5e2714f8a2a15d23e71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B86 16788 bytes