Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cc36a1c2bc7e12…

MALICIOUS

PDF

84.2 KB Created: 2021-06-26 10:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fb8b8634aed3e4f6ecd14a1e41cedd14 SHA-1: 5f92577e0cf6dbc6f8270a6872458681b73ac786 SHA-256: 00cc36a1c2bc7e12959b2dee38e039bbbeeebf40a45a9abc2b26fbd04d2168b4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://activepymes.com/pub/file/vugokemefel.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/97237099928.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734765a2f62---84256257724.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5cc640708d0f79fd0281e8a88854a7f8/sadoxoleragemegepipili.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095bbd9b7acd---89493964689.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/2de309faed58124b7351b1ac09d52b04/6628059382.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/jejetakadijunewudazi.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3da2e5663---sesoxipufevopav.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/0algp309q96dk47ne0p9mo5ema/bamuzinelajivawabakoxoxub.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd183003f2e---19073171122.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/38157469537.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/25515152590.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/paponamawof.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/97a6d56688da6b42c94bcfe959247c3c/95330896936.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/115b0c545cbc43399e563c70fb6700f6/vurolofixiroju.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/tatum.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f88e12f74---purexiragaxalijevuwemiki.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/74a229e2c37224b1ab5b928c7ebf18ab/52819468275.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4456d2db95---wuxubafibobitubavigil.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa9779c0f---sibeti.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/resumufowonidupiravuzeju.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/89906837127.pdfIn PDF document text
    • https://miet.hu/kepek/gafularotuxadijowabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=he+told+me+to+do+it+passive+voicePDF 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_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 16472 bytes
SHA-256: c795d2a6910394be88edb8218ac68cf935e6a6d9c43dc1a5ca0850ae3a417401
font_01_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB2 10528 bytes
SHA-256: 7f47f58a1a65fe8ba8cb80dcdfeb782c571b474fe2847b91cc11844c7f97e3a6

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