Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05d0c0bb12df0ba…

MALICIOUS

PDF

69.1 KB Created: 2021-10-03 01:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 11c3b977300e0414f79787ed86eadd47 SHA-1: 6a48543260043b64c0a18e7334fe2ff05c8be88a SHA-256: c05d0c0bb12df0bad9646d43876881e0ff862a9738c2a4b2cad445c74a066498
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which appear to be compromised CMS uploads or hosted on disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b72cec396d---17323155286.pdf In PDF document text
    • https://partnyor.az/userfiles/file/2831001759.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7jleao6mgtm8vtmnh20s26bhp3/jisin.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/98828220435.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/jodobafuzovaxadudoxeb.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/raluxujuxibabew.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/41807487000.pdfIn PDF document text
    • http://tid.vn/upload/files/gujaxuwejukaji.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16147dce0284e5---25828281770.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/5ceb1994b0177b5a29e9ed1bf0743c71/59713827689.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd64a3b903---jetovuz.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/25646109433.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/90953259269.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/11437619626.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/10213457646.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/lalutulabako.pdfIn PDF document text
    • http://aquatherm-graz.at/files/84582523991.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/wuvijofemimidivitujip.pdfIn PDF document text
    • https://kultmotor.virtualbodybuilding.hu/images/files/namexebotesowabufipe.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/kivomasigerusaluj.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/nodidubizid.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/dazizobejotakikezaripu.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/dagixejujox.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/5131946320.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16148b37eea792---24629185431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=the+5+principles+of+designPDF 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_off0000b1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D0 10736 bytes
SHA-256: 3b35ede006aa0dd013e1a17d57ec05f625f3dd4a158acba8cf0ef8a22f017ae7
font_01_sfnt_off0000ca32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 14640 bytes
SHA-256: df55232a3d5d6fc616b1bbe57abf12b13e7a9b5d16725f94ce7e2eb9d107daf9

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