Malicious PDF — malware analysis report

Static analysis result for SHA-256 45092e09c98e6fa5…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 13:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6597a96dd258988eb1fc9584468f17a1 SHA-1: f173b4d69afa9dc41cb37dd411ee7000a6570311 SHA-256: 45092e09c98e6fa5732a836df0bcfe00f12d6d400486425a8fcc15bd80103959
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress sites, likely an attempt to redirect users to malicious or phishing content. No scripts were extracted, but the presence of numerous external links suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/vr8qv5m2ohlp09hq0k70m81h84/83241151917.pdf In PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/327981df22e23c285e49b51d9fbc73fc/sabefe.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/jetidoleketakotojimet.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/laxemeg.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607da863acdf1---56955425075.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/3f02usu1nvbvs8hu6e96rfisl2/8498889987.pdfIn PDF document text
    • http://coffee33.ru/archive/file/wiwulopiromodotowupup.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609103b101ea9---31430425381.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/80835544837.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced9950270---18320530623.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/77291119131.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160736b4570781---mufuwofedasa.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/garurisozafujizujupawo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca393b7ee1---74964792650.pdfIn PDF document text
    • https://termoformat.md/img/files/jofiluleto.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a7ee986a9771b6d3adb6c70abe79a9c9/konajazuxepi.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/denifenetokagiroso.pdfIn PDF document text
    • http://www.nomorcantikspesial.com/file/mesusifopusutiwepibefexir.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/duwoxenuro.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/bb36a87c0438a8e19638d6392c093638/92130066409.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b0b3020108012b1cc930ceba32eb0108/dupakurejagotevofagexa.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160717b55b3896---wixerokupegilokibisa.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/23560118081.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/vuduv.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/89912875189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lisp+in+2+year+oldPDF 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_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 16820 bytes
SHA-256: 0743ec2d37acd56e9001476abdfbd109f5ab47f36cee2adc92d288893cf68568
font_01_sfnt_off00011deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEB 10476 bytes
SHA-256: 33b587ada978d9a84e436604d06f2e39fa749ee231ddb6a37a18ee23c9bf9277
font_02_sfnt_off000135de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1