Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f204df0fd412bd8…

MALICIOUS

PDF

70.5 KB Created: 2021-09-19 07:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 823f225043383b1f8bab83c1068f0e07 SHA-1: 855984b4e2ccd74a9d7a54460cc42b314a4d094e SHA-256: 1f204df0fd412bd8db677a7da7b07c110738986092911673676c8ebf36cae6cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It functions as a link farm, directing users to compromised WordPress sites hosting further PDF files, likely to facilitate malware distribution or phishing. The primary URL, 'https://allytemp.ru/uplcv?utm_term=friday+the+13th+game+free+download+for+android', suggests a social engineering tactic to entice downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=friday+the+13th+game+free+download+for+android PDF link annotation
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd6cc6c485---73685948106.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435919b0cc6---97153443021.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210902030120.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/a43c90rtuqhf0o8lj1159tu161/selidozifijirekevoz.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/jumojobenonejowosi.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/34804861515.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/tasedewo.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/34582990725.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/savoga.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/9529801788.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161328d277e56b---jewupidewerawufujer.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/81525483848.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/muniba.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4ptooohf9ig8c15lngo7aehj6q/23584562295.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133488d0b21d---43081042480.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/30310381756.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/76119869674.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/rifejofovider.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/vupizoromexunedetukujez.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/kixopozazugiwig.pdfIn PDF document text
    • http://lemarko.com/userfiles/file/82784722162.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/wowezi.pdfIn PDF document text
    • 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_off0000b4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AE 14976 bytes
SHA-256: 87145e9bfe64d55b37203bf668ecae0f225b5fd6f1a02ac48e6c7274ba2a9d9c
font_01_sfnt_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 11036 bytes
SHA-256: d7f18639dafc5139c38c2fd45a7d52e6cb7d43ffbe7983a93030e3b325c51428
font_02_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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