Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06ded4ab4ba2275…

MALICIOUS

PDF

92.3 KB Created: 2021-07-20 08:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81a2d8c4b4f7fe535f265f41f116468f SHA-1: 5ac24cfd22e00559aa9e2a3ca5706dc1308aa077 SHA-256: f06ded4ab4ba22758f01bdfefb327a127359b3ec8ee9351c78cd692f3daea594
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c206598e15---77021291129.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8020b2cc6bae01b8f350885b69adab25/25375787584.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/aab1e6168aa181fd13bcff63fa65fb16/57133707533.pdf
    • https://burgas-remonti.com/userfiles/file/45509600693.pdf
    • https://bestcoloringpages.com/userfiles/file/13403489445.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/90ae0cfea37134a75113714ef4ec6598/40707582887.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/majiciljj99nupbguh4j0l213c/mifivirejuvife.pdf
    • http://buchtel1967.com/clients/26382/File/sewiwurivukuvo.pdf
    • http://www.multigacos.com/admin/uploaded/fck/file/bilunebajetufugizevoxatax.pdf
    • http://metafelix.it/userfiles/files/varotub.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1930d2b72---41937001527.pdf
    • http://clinicaveterinariailmarzocco.it/userfiles/files/jepematurujirawu.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/300d6838697c356c4a3674135638b9fe/zabiragugav.pdf
    • http://mintaialuminum.com/d/files/3103828885.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ae18604e56d3ba3c0c2486985a9980be/92693325846.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/2398456860.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607072c8aef3a---86374590727.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f225a64b427---pulipavewelatinunikuwibum.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/bb60b0faa5324ebddb8877080c852f30/rivubunubasobilamimomenu.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c074b481abf---4011297865.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160746d9974ba4---69162625132.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=someone+is+walking+on+my+grave
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e6.bin
6db10c6e6643663374dca5f70665b9511f9cf1f6dcf08a4b00311dc053c8f176
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 16884 bytes
font_01_sfnt_off00013368.bin
fae9f630d46fa9c2b61ffc2c073b03814d118f55e2ddfc97d51f47eaffdde8a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13368 10784 bytes
font_02_sfnt_off00014c3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3F 16792 bytes