Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea486a5e9195f246…

MALICIOUS

PDF

89.0 KB Created: 2021-06-29 20:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d5b98c976360490353906bc2896ed3a SHA-1: fd0183fe17d99c67134f9eb7c8fe922bb9eea54c SHA-256: ea486a5e9195f2462be831772e9e876f0ef1811118fc9226517a05ed5f1053d8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories and 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 through these external links.

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://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zimewupubarivomepuwuweg.pdf
    • https://syteq-pro.com/userfiles/file/zetedanakilidofaxunexuse.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/fhss28i42udikde75vm7b1tg3s/digipefejufis.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b698059797---kiputuzogate.pdf
    • http://colorfusion.us/admin/images/file/77365454185.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/fd6adfa8a1a325b49e0142dc45ecc9cd/93001527110.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bce023e12---vigusavovimokujizegaxeva.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lfkrq2eijkon47t3g7etp03dkb/54274598322.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077864c637---zawezipikex.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/629f80af859accea350ab3f80912c373/vewobi.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/461d33a9a264c2bb4ca037e8d7a8760d/36613595080.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/kmco0nbk2v2ue0vm7jmc4fecj2/61266530975.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c4f5a248e---jukamobisuteziser.pdf
    • http://www.aqsclimited.com/EditorImages/file/36792067595.pdf
    • http://vervesimuhub.com/userfiles/file/45810085691.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a811429eeb7---wamovu.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0e03ec3d2---39099444496.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1dc9cb013---nijafosajovonumobofubirap.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/435476a3382a4613410f09e59a029ab5/72873603212.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/313c8e2ce6366948a3b7399df619c31e/wekosixasamebexuguwid.pdf
    • https://www.carrentchiengmai.com/files/27593805551.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=biology+science+fair+projects
    • 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_off0000f8f3.bin
9b828afc0028c2550e489a3ba3b73574f0ade20f36f0e5382ff8f565db4bcc34
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 17004 bytes
font_01_sfnt_off00012571.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 16792 bytes
font_02_sfnt_off00013d88.bin
a246e7e6c6a8b58bf9c11413bc9cf8c362d41ebc3a5b6914ed8fd6919ccd76c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 10952 bytes