Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a286306581592d…

MALICIOUS

PDF

87.5 KB Created: 2021-07-24 05:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1dde1c1d72d58d844c3763a626ec7758 SHA-1: f2a123d21637573880c9bfe5dd1e72d94716bc31 SHA-256: b6a286306581592dc1eef4636a8e729c9146caf7f593ffdcb931c7b4e5d5d746
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. The heuristics indicate social engineering tactics such as a fake download button and instructions for a password-protected archive, designed to trick the user into executing a payload. The presence of numerous external links, many pointing to compromised CMS uploads, further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c9000cd3830df09d828a3b2dfb57fc6c/67735204885.pdf
    • http://lucann.com/Upload/file/12998498172.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/2277604ccc25b89038cc2a04a0a383ba/juwuximu.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160739f5f3ddb4---bawojosetadibofenojalus.pdf
    • http://shuswapladystriders.ca/userfiles/file/15173940168.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb411392d5b---zanexadokozuwif.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/38d78b0950879a1950a84eb95def092e/47392872809.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/025d1ddc41451d862fabb282e5baadc6/60626882684.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160894812209fb---55050489708.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26cbb5caeb---duzixixipixutefeda.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/589ef732a4497ea561779d384cce3c08/gitegugikaba.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1872106df---warasezuragutiba.pdf
    • https://www.hosotte.com/ckfinder/userfiles/files/lefapejobizevor.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad24b796e---miduveworivesososut.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/83e2e0ee3cf3f7d459edae7593ade40b/makobekodukoxo.pdf
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/xolifurivel.pdf
    • http://liqaa-lb.com/files/userfiles/files/8343821245.pdf
    • http://freeski.hu/freeski/file/xititi.pdf
    • http://pajurioverslas.lt/ckfinder/userfiles/files/taxokirinar.pdf
    • http://www.anclupnapoli.it/userfiles/file/peluratut.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3f8741ad376abcec25d048823faac07/91110094165.pdf
    • https://bepxuyenviet.com/upload/files/24186061529.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/vl3k3u7qq57gatpmmirmrd7oh2/71882021038.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/5f4d1a9d85d776675626b2ea0b9f23bb/69614305971.pdf
    • http://www.tractortools.cz/ckfinder/userfiles/files/denowafexokovexazidoxuxok.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/3fe61ef82a8396789c2de1bade04e0d9/55465571335.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=corel+draw+x3+free+download+full+version+with+crack+32+bit
    • 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_off0000edb0.bin
a5dea62dcbca1447513367914ac772d8dbc3225169a4f549748d630da6f02a34
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 11484 bytes
font_01_sfnt_off00010900.bin
66a867e735d2bb1d404059c98ae4e4b98bbcefdf672ef16b2d45cccf0f47ca5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 17908 bytes
font_02_sfnt_off00013782.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13782 16792 bytes