Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45a5140481624d7…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 14:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 02160a7ac73f039ec67090b94d1f3c62 SHA-1: 9933bef4f2627cef73468b318584b0e0c7bd576e SHA-256: b45a5140481624d7e555753c3ed8ba530c96e2c7fe960308c98feb4df7eea313
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_URI heuristics further supports the attack pattern of leveraging external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=how+to+set+citizen+eco+drive+watch+h820 PDF link annotation
    • http://popmetre.com/news/files/magotatonamu.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/73456646867.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/8703d627018f6d170c8bc73e585b1fa0/28210525863.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/womuvawojojesifu.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/36051549386.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/35549514465.pdfPDF link annotation
    • http://fundacionecla.org/resources/original/file/38948661221.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/mopijedus.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/nuloreladiparot.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608360bf860d4---13507370184.pdfIn PDF document text
    • http://abpaluso.com/upload/file/3894041639.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/fagupolavune.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/batumojefa.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/vodomakuwiwokotoj.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b9f6d49b---nefata.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b659a94e3c7---4334933628.pdfIn PDF document text
    • https://carlojans.com/cms/file/kugetamevujeduwal.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/51235578388.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c938494f31---53050807364.pdfIn PDF document text
    • http://mousike.it/img_ins/files/67963157273.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/17267377249.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a02468952---kakipovuzefewopu.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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 11076 bytes
SHA-256: 8994664b5cfe62c0e8e64d9953d2d9f6afb4ec8db69b39383d0c428bdfcd6a4d
font_02_sfnt_off00010cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB3 16872 bytes
SHA-256: 19cc593dc3da06b26347433f6f2fc303ad51bd6e69ab032987c499d12680dc9e

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