Malicious PDF — malware analysis report

Static analysis result for SHA-256 459fc5c2f5e8a5e6…

MALICIOUS

PDF

75.8 KB Created: 2021-09-21 06:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac40d862d267eae80f9b265996b9f942 SHA-1: b043e7372b077b33eff16f8db7a2082a6d894423 SHA-256: 459fc5c2f5e8a5e677d8a9f92c6e028e0403764926cc7649cc0b104ee4ec6cec
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pixomot.ru/uplcv?utm_term=ghd+sport+live PDF link annotation
    • http://pijntherapie.be/uploads/files/93312328767.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/89732800181.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/kifavinonaboti.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/vavulumidonetopapa.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/66668414883.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/85609842481.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/25980760053.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/11685472286.pdfIn PDF document text
    • https://atlantidegattico.it/file/duvapakikapoledoxomitob.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e5869d4f2---47421031029.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/46721873220.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/43911295063.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/33871392713.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/70529765936.pdfIn PDF document text
    • http://autovoda.ru/upload/files/89856749589.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/51996254221.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/nulujedalidupalasozus.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/roxipiz.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/eaththn2si13rnsb63uf9d1eb3/jawadonuxexewaxubodalo.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/rulanulubazigegimav.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/9383985406.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3fe83633e8ecf8076a3f58bcc136b1ce/nevavuje.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/fegurufivozuwotaku.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_off0000c5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FC 17224 bytes
SHA-256: 3c51baf871a241a9e2b9e235c6faa24038f4393d9f3cdca654a0b26878c1e287
font_01_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 10328 bytes
SHA-256: de27b98262c110478d52850b063867c4c0ee83aea8438639a1212d52a99c9576