Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd17ad7d832b289…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 17:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d002309fc22e31039a897ce67eeafe93 SHA-1: 84b76f5640ac5014d7f997585a3d8a9efdc4223d SHA-256: abd17ad7d832b289cc696bcbe9c4a1852f01b3fe3501151d451cb265815476cb
204 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, with high confidence. Heuristics indicate it contains embedded JavaScript and is part of a link farm, with a specific rule flagging it as a payment redirection lure. The embedded JavaScript likely facilitates the redirection or download of a second-stage payload, contributing to the overall malicious intent of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://kxqcgs.net/filespath/files/20210903102559.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0aff2b7d1---javidometew.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/titedijegimon.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/99314488634.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/zadolemogilobebefosil.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/75649216818.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/siwekos.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/72078344764.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/tibufamezu.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/jarona.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/52602361891.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/57738391195.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/91745410395.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8fe787b6424a450e3af7d6b96a6aaf85/sidudegirediwubujufetad.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/revebopekitafodarud.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jenukesipabejebasipevujis.pdfIn PDF document text
    • http://kammed.com/userfiles/file/julamoz.pdfIn PDF document text
    • https://dafelia.com/files/rifowunu.pdfIn PDF document text
    • http://reopen911.info/media/file/losubuzutebebosivejali.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/q1483e4admbsmn8r3mdabgo7e3/jojawosipi.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/tikuzasikufabajulikazale.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/9661502531.pdfIn PDF document text
    • http://metall-press.ru/files/87842780818.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/chut53ne98agjv1t6hegqnf1ai/pifuvibotizajomezisopox.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/zumelinodil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+lottery+activities+pdfPDF 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_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 17328 bytes
SHA-256: e3139387daccadfb4d318d971b053865ae8af6c513fc142e7668e25a790ddec8
font_01_sfnt_off000109ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 10756 bytes
SHA-256: 01e1a711f98f240c3502bc4c6e8aa4c3d615388c2a50caa5827abba9191e4ac0
font_02_sfnt_off000122c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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