Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47227118931d4f9…

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 17:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9df9e3e37898e1d04f66bfa7840a6245 SHA-1: 7ee75c8ec92a75625c1a03d354e3ede0306e7d35 SHA-256: b47227118931d4f9399e93eb5fd539476d1fabbfbbaf311bd7ac9a2c53f4e16d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or link farms, suggesting a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document prompts the user to call a phone number in a context consistent with callback phishing or tech-support scams. While no scripts were directly extracted, the presence of external links and the nature of the heuristics strongly suggest a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=prevailing+wage+labor+rates PDF link annotation
    • http://reutlinger.pl/userfiles/file/3168021759.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160793441c3634---27439719905.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16120e6970b4b4---dikojo.pdfIn PDF document text
    • http://asustainable.com/global/file/pilagosizedeb.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/33852148974.pdfIn PDF document text
    • http://allasclub.com/campannas/file/jogizanatusomelewi.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/17707356498.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/52200740409.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/qcsnck2qfrqepq0iijs99i0piv/xibetosidu.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/94cf228f06646c9af4d17f39983a301d/50211983342.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/91719268343.pdfIn PDF document text
    • http://annabarons.lv/files/files/55312978691.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2ab9db342c15abe3f324da5bb5471d70/94055242919.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/89844665a51880f592b85b9be7177279/tosawivubujemojij.pdfIn PDF document text
    • https://latework.cz/soubory/pilofopaso.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/844b89ece616c67a92388998117806c6/53793622730.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/329376f587406b33df4c3bb1b8446ab3/xosuvokubebaxu.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/34548431047f9c40fef36d877b5d2101/45483265688.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/bulovibelesutale.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/tolakadopalapefiwa.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dcaa02d10---jejajekaju.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab2ca87f31---tinewebapufoli.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/wuzutururasuw.pdfIn PDF document text
    • http://ippon.lv/uploads/File/75381525426.pdfIn PDF document text
    • http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/sogirereferadula.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_off0000cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5F 16836 bytes
SHA-256: c6f8a463b7a3083d8c7300e1979973c9488bd3040b3cced9e08d580c815a5160
font_01_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 10576 bytes
SHA-256: 20556e96aa8b711b048ee3674bc84342e099ac7c58729a39395c6d3d1b6748ce
font_02_sfnt_off00011306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11306 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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