Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6709d3e287363e…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 05:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe8a8d51401de75a98e8d6ebcec102ea SHA-1: 8a94aa8c0c7d3ea39e24a578356f8d14ed4b7d4f SHA-256: 1a6709d3e287363e51ed5355988ddde61f3d9efd841a473f1d4b9a70e662219f
236 Risk Score

Malware Insights

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

This PDF document exhibits social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to copy and paste commands into a terminal. This action is designed to bypass security measures and likely facilitate the download and execution of a secondary malicious payload from one of the embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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://laborke.ru/uplcv?utm_term=command+prompt+windows+10
    • http://adamlegal.com/userfiles/file/75669943540.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a850fa732c---dunim.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8718841764e0fd03dd965caf0b2af31b/fuxijiguvexibaxunumijiro.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c3edc913d---tokimeminixede.pdf
    • https://atkarisuli.hu/userfiles/file/renokaxofogu.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/qr4alpi82amghkmmtc37nkaue2/34762202907.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/dadegiroveponi.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/c76thtao5kj1b5ejp3b763sq0n/fidisiruresanogaw.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608156d9838c9---lovizozalerimajebufegakir.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcf1124148---tubazajoribezulepizavaril.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/j0c19k1kn3jtcdivvkcs9em0c7/nanowopitutekenokalixazog.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2c084175---21170114751.pdf
    • https://primer-spb.ru/files/files/nebiposevabep.pdf
    • https://ahreco.com/uploads/news_file/9792721043.pdf
    • http://occahomesearch.com/userfiles/files/29494738243.pdf
    • http://aivieksteslaivas.lv/userfiles/file/10375923352.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d9b181fa8---waroruguwumidezakamasuki.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b109857c48e---nazopomepifonenekur.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/fg8su64b5jgr1qhqi1nrs3mj30/fasep.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0906a6f183---34228096133.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/faeidgbuto9f959fs5b27qjahq/wofozidekuposubutakamalaf.pdf
    • http://cokhihoaiduc.com/uploads/files/41689516982.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091183c1781e---pasidogapitolivopogoxej.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ab2d75ab82dc0427678b23b62630f7c8/rifig.pdf
    • 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_off0000ec0b.bin
fea390c32cc6d59b0822279321ac0d99fc62bc9460b7261d643689e5138a3a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 10668 bytes
font_01_sfnt_off00010490.bin
9b1deab2d5029bb4ebc990a5a8f8487e039786320c67611fe0110cd200646caa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 17636 bytes
font_02_sfnt_off00013324.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13324 16792 bytes

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