Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2f6104d9f8c340…

MALICIOUS

PDF

89.2 KB Created: 2021-07-13 21:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 936069760f457a756061dce021aa84dc SHA-1: 6b5458d3bda250d9289a0943ef2ec6a780eb35a2 SHA-256: bd2f6104d9f8c34049df9b73e2aa2787fd9410992650bb545a7a29e993b02ae4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garglob.ru/uplcv?utm_term=highest+paying+actuarial+companies PDF link annotation
    • http://st-johnson.com/Uploadfiles/files/11922441588.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/25262689081.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/xidakojononufi.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ad0e990fdaaabf361115ea69e4d42821/92233676099.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/86974904622.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/zazup.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/tosilesizi.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/22338569725.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872d16da1d3---67561228049.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/gasufavemuxovelufowev.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/peledaruxonebabezotevazi.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a2e7d3e77---wurugefuxirewawimod.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/m97l2g52lmt4kto1f468559vg1/debokisojizolifugituvi.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6f330dee---4109288290.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7c6867d03---51562684522.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/csicmoni5h8b2vkujkkfdbj2gh/47306565172.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078798e8ecb9---83059333763.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ae25ab9aab7b847f396dabddf6550ac3/8490309573.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607486d6854f6---18009657533.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/23308316766.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/vakab.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/34736148528.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/328fb2927ad74f7f3e191ba3434087ed/44379525236.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/merotokofedugidiliwenim.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/3v9phv3hsqdm23gv4les8db835/86909475046.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/keuf7vfdf60ba9o5rq27hlsqsd/75344573190.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_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 17572 bytes
SHA-256: b1491843379d2621b89d699688a7746ff1af3bf8568c1af820ea9ddf390d2e91
font_01_sfnt_off00012618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2F 11024 bytes
SHA-256: 6f5eacf224b38db665908ba2ccbfc542f674d0fab94e0d06c6d9ac251fd130d8

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