Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f604b00ccc7a458…

MALICIOUS

PDF

89.3 KB Created: 2021-09-06 18:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d5605b1427313a15150aad985f9adb6c SHA-1: 85082b234e0b0aacd16ab9a97e685a610a73fb59 SHA-256: 5f604b00ccc7a458b7607021f2be2d3a9c5f693e4ef6467b02b5915be6e8c04e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document used as an initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://1careglobal.com/upload/files/41548857390.pdf In PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/5be1eced3373b136cd59862678d19d28/veduxujo.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/120c2f859fca4dc32a6c4d50a2dce8c1/gebudupazuremadiririz.pdfIn PDF document text
    • http://vitrine-prof.com/files/totatulufitufagasedusafe.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/pokegemusedusurarid.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2b12a9517d5766013dc6bfe6793ce39f/zewatasinulub.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/gutirir.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/sfcnpfpc2va5ivhk0f1osbv7p0/53739089908.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b47b3c1f0eeb534c5889b4c45c557625/tedokikofimefafizilo.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/88312764819.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/zenevopewabaridodebinovoj.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/dojemibuzanonopaxela.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160da0ab146567---fovib.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/29629629360.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/54934479017.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/45006513807.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/fumuwowenekezuvanozabir.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/89d9c37d763d5e563d577210d845db69/tipakirarofokajapijemu.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/88967831622.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/a72c584921192c7d7851a50b80421b1c/sudafexufutasexezizu.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/73457800356.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/010daec641acc8aaf38964c944abd638/26862064779.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/mazodimobafutedetere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=breakthrough+plus+4+pdfPDF 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_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 10904 bytes
SHA-256: ab2318d74014a076db2970c2d947133702ade829217e9904649a58aa655b4c0d
font_01_sfnt_off00010bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 19884 bytes
SHA-256: 2f4b41488e06c9b047bf7ef414f462fc6fe0374eebfc63874ce2d3ec130e8ae4
font_02_sfnt_off00013f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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