Malicious PDF — malware analysis report

Static analysis result for SHA-256 f494da7138384d07…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 22:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 123b5df63c5ca044d632bf4e14463ecc SHA-1: 24f12371222cb3b2bd41a9f6f083a78646a7801e SHA-256: f494da7138384d079cde4a8724efaa61a83eeea5b4a3385e63602ef9ea47fb90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5014bae5b---bagavo.pdf In PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/sunamepupijojavokanoxoji.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/7980159797.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/65144003693.pdfIn PDF document text
    • https://go2germany.ru/files/file/dojoramixininixetude.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/nv8a5hljfo1t0o3ph385vihq9h/nesexoxirelevew.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/12e3d79dbc49eb05bfc9d9929b75dbdf/mavesenoluluris.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/majepabedab.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/44518042356.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/31651653187.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/16c6ab2fb9c88d6095744606cb6df2f3/xowogefugomajatu.pdfIn PDF document text
    • https://go2germany.ru/files/file/guvijese.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/47991599818.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/57299582b581636312abc4ad1fd4b373/5664407676.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f5b095a0---bejejokumovemodo.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/zigetezevuzovek.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kk5qv7mcdb4oldc7msomls4jio/rifulevijozavupela.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/5q9oi8i1ec3nq5ocu5r0t0eg0l/lewokirisakemogegupemes.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609486d1397e8---8570049101.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/botuvuluwitujugefob.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/805c389d0aa50b93dd4e2eacf2eff56a/jutobekevidad.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/vm5fddji2ar09p84obqr0v1d84/28600773911.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/furobeweti.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/58440410409.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/wuwirubibulipopara.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/76903531730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sccm+mdm+without+intunePDF 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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 10420 bytes
SHA-256: b4f7b1632acd4cee7d16565b0f2ddaf02cb42bd507f953d603c21b82530007f5
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 17124 bytes
SHA-256: 8151e503d8145d3b92fe1fe536553b8428b50caba25cb79b83e5b7c476e920ba
font_02_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1