Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a59a604cdd604de…

MALICIOUS

PDF

96.6 KB Created: 2021-08-14 04:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c466f76e4615739d925462d342488493 SHA-1: 194f697b9e1d43440267dedb2c25a5195ef011fb SHA-256: 6a59a604cdd604de410e6f2d558b8bfe437afcb70bb98c950a8fba9de2e12356
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://nomylo.ru/uplcv?utm_term=pack+roms+neo+geo+winkawaks PDF link annotation
    • http://ourgans.org/userfiles/files/41965285749.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e81b3a883---rofarerumutekupanikorarid.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/mevur.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/rukulopisegamoval.pdfIn PDF document text
    • http://babamoleskine.com/files/file/23512728053.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/cc74d56f06e894f33fd064a21cee21bb/xobobosizovalepiduwele.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fab20c94b3175d7edd0394299dea9fd7/sawesudodakitifixetakole.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/260423154533.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3e5bfd1baa35a4dfbc635630ddf6d4f5/bajof.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/30742957375.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/popobo.pdfIn PDF document text
    • http://kkitv.com/images/upload/File/lasikizifamilow.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608df10dcb7c2---jaluzelekinalinuvamataf.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b359b29e56b---60368917783.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/43n37jb9a57es9g4rm0gqhd5tt/86434579110.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/11745666742.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e795cd1b0---1833919661.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/dozikuronamiz.pdfIn PDF document text
    • https://wagaskar.com/media/27122328629.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/956b5d450e73647b6fa01f5652f21fde/41143678238.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/98972158178.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16110786b7394a---17234127271.pdfIn PDF document text
    • http://snsi.jp/image/news_file/3141505668.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 8376 bytes
SHA-256: 84a54135463e5be8e382e19ef47af36235040e25633cbea8173bf1e8cfdf6964
font_01_sfnt_off00010fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 19504 bytes
SHA-256: 54ec2727feca559123ca199d5196381f6959452f00c46a015224d2bb1a173fbb
font_02_sfnt_off00014216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14216 10608 bytes
SHA-256: ff03c24fadcbbcada642255a81cef90a7148e63627ae0e4d9f934fbbd58e5c4a
font_03_sfnt_off00015a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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