Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dedf00ee45afa56…

MALICIOUS

PDF

115.1 KB Created: 2021-06-13 19:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 636ca715bd91809d852d9da1e8fff03f SHA-1: 77155b65f7e54fe070c6b376b2dc315b2272b0c5 SHA-256: 6dedf00ee45afa56e70f51957551e2d1fbf6e86261fad45c2cca90a909fb7d03
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to host malicious content. The presence of a 'utorrent tamil movies' UTM term in one URL indicates a lure for users seeking pirated content. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a downloader for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=utorrent+tamil+movies PDF link annotation
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089015b6f28b---kaxiremulerazawifevufa.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/6a9869cfffcb9828986ffedcf5b88b3e/32505173624.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/87263380510.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9e4a6ed6318f61dc29572cb8647b44e2/movofigine.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/ce7c62491cf9facba58810a678dc9ba7/16391922929.pdfIn PDF document text
    • http://sakem.org/userfiles/files/tunupi.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/mu20giqan15ql5jqufc8bv9686/35653154490.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/e366455731db85ecaefa1e86b6f13cb3/2162577918.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/77371900362.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609437b86efa8---pefosavifusuwatu.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/p54ui04n61k776jhdtpc6re4pk/jeretozagimepupifazeza.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/71313048956.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750b5634681---87672882964.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b00190e619a42226f3a67ead16b622e6/tiwokafijekal.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/ojkm3ojis7h6vesnnqqcl0dmm5/66187771113.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1e2afdd5c9b9cab1e831367ad7b43146/99097618112.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/afd9ac09a608b9d03d183f47a5e9aada/17159272625.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091ab4d06178---75050048360.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe4461103e---vewerilowijivize.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pihtqipp94fa6m0mfbce6g4d61/14891811322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off000163bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163BC 4672 bytes
SHA-256: ea709958e28a993f6f63a39fd0807d0e9143490b3981b871ad68aec64bf0e567
font_01_sfnt_off00017375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17375 11748 bytes
SHA-256: 12d8d5e1366d168a9e4633141e72541c1962e9f605a28deca7a92ca871a729ee
font_02_sfnt_off00019ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD0 16176 bytes
SHA-256: 2f22a9f04fb8f1ad5e7e1c67d3ef5331834762dd4f34dbd438692f8ae23e7869
font_03_sfnt_off0001b006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B006 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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