Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c95fd5a94cbfd56…

MALICIOUS

PDF

101.2 KB Created: 2021-06-28 08:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 09ab168643c1c6e2f0245a8563789412 SHA-1: bc3f8f40f36924b875de74770b2148fbe612757c SHA-256: 2c95fd5a94cbfd5684a93ace4536b784ef647ec5017b39716377a8f89e77cf25
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs users to copy and paste content into a command-line interface, a common tactic for executing malicious commands. The presence of numerous links to compromised WordPress sites and disposable hosting indicates a link farm designed to redirect users to malicious content, likely a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/6r1inosae09ln8jsja9kqqslq1/piniledakadatozuvaxapinor.pdf In PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/4hk9iq4b2l7et7i2bm33ne7hnj/jizegerilotavofol.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/27558205620.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/dogunotugefisewadasavuwo.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7637585b3f2f8b54c0129aa0a41e6be7/pulopureku.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/69444537705.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/c4cee13cce653d6ae712728e90de4256/95409732121.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/5q6klpbbter16l0s8nmtea0lsa/wetefoz.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d04be79277---74063183377.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/1d6971374e3f82fb2b17726ce8655d07/60271382940.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/febelanivoja.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9jgj5jmvo7uo96k65ag6th2v06/bibegurewisixibezebanike.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/468e99c117247f8a4f5b27015e67f743/niwoxatixo.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16077c20b2f7f8---38051022662.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5a381a4e5a30ce46ef7dc62ad86ba05e/wamufevipetijiguxo.pdfIn PDF document text
    • http://changdahk.com/upload/bifodejofevomekibipa.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/sopuruniki.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/wosikajisukululekido.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/runepixisozavupi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b82506b48---52295201682.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/88233261864.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/iejlcqplrfg52a8oap8udcrhg7/sufimopaxuri.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089592235102---89403714940.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/06a0953ee3b0c6434e2f7f642ede9470/dunelotatibupupuzabisulu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=irql+not+less+or+equal+while+gamingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 17900 bytes
SHA-256: fd14c637b6b3e256154b06e5b8a7f4bb49dcb7a619cb8e4e5a0e61754491354c
font_01_sfnt_off0001569d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569D 10840 bytes
SHA-256: e6ccea28f226b983fd4bdfa980fd52d7f788e3a5897bebb85d264d0211d436f4
font_02_sfnt_off00016f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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