Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fbbb54898161a6…

MALICIOUS

PDF

110.8 KB Created: 2021-07-07 15:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cb937c46a6687a3247b992b74f493bd SHA-1: b07a66c0cf1549bd78b43d7b230eb2ab4bc3ec1d SHA-256: 56fbbb54898161a6897a2846da995121e7cde927a5ce9c75444b8fd5c63d2478
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, designed to redirect users to potentially harmful content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4b3423e880163d688a72ffade1437685/naravopupujotiperedi.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866994e2e58---24100450222.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9ce59ed130ea4d38bc6627ced063916b/wivuborupipig.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca85a7d8574---49625951549.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jfsc3riskcj3gcphkb7uvr6kp7/jowitebawurorudizipagat.pdf
    • https://benqmusicworkshop.com/fupload/file/xikagulokivoxipuwimo.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/75517460154.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0a95d89e449e2fee8814da2b6ec755c9/79192379630.pdf
    • https://communeouchamps.fr/userfiles/file/72295154380.pdf
    • https://allcreaturesinc.com/files/files/xufiram.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd52e43889---40322591060.pdf
    • https://ibeguiristain.com/userfiles/files/tarumakapokun.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608504be76f81---rivejewerofole.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/00e540534fa331c71e81d570429f82c9/kowililivizuwumifajo.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/g1mngpnbok975dfciov9765hgk/xapifevunujavixum.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1252047ab---86235775766.pdf
    • http://tuzvedo.hu/elemek/file/54057007640.pdf
    • http://networkinglikepro.com/ckfinder/userfiles/files/tilezibadefes.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/c7a72d9b385f2130c64a7bd1816dfead/nozupokenafaso.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fce6ef97da4401083f6a5148f81540aa/35824141412.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/0de965f9841294292fe3cec5b440355e/27731998827.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bd56e003---31068162280.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/fiporoxevojutuvilel.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075fb0c92560---63234129947.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=officer+of+the+deck+study+guide
    • 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_off000153ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153CA 16792 bytes
font_01_sfnt_off00016be1.bin
78bf9ea11910a89c186d6518357984f86da1704fe95d19e1ae7989797c2c9a49
pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE1 10772 bytes
font_02_sfnt_off000184b6.bin
ba3013d57a7cda4156bed8cb36ff59feb083bb15c453b265e15864b28181757c
pdf-font-stream PDF embedded font (sfnt) at offset 0x184B6 16052 bytes