Malicious PDF — malware analysis report

Static analysis result for SHA-256 61584c1c7c3a8d1d…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 16:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a796b0fe901365f2ba4feed8ca29ffc3 SHA-1: aea031903e9e5d088f728f7b9538b1efc5793a03 SHA-256: 61584c1c7c3a8d1dcda4c654de04ecae095ceb8b01e85065f613d1be48fb4050
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ahgdkthhlav4dh1oesglsueo5e/notoxowe.pdf
    • http://bright-mineral.com/uploadfile/file/2021051709502740.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a18b7392---kupadetizebabugejizo.pdf
    • http://ahdjcm.com/upload/files/lolipazusefitigivuwot.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1efea66ea2d82ea8de9b5c6bac24fadf/17004370105.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/sdqfu08n04hldpada3qjcocgf0/14123475558.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/27bdef315819fd8974011a3bfa88d3e1/83240722520.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/0fc1fb13b68374d8a94e1e943d47b131/23492332526.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a29e3ead77851f681bec1e2daf48d9da/pubuze.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5a15602373a1f6009f871b232077a5a2/deruzazadaku.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0021945988---zazukiwasevaroxakexosekiv.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/e7bbf6223d5b7fd54affac836fddbf5b/jabinadikikesubugulojaj.pdf
    • http://alexlunacoach.com/img/editor/file/21734052456.pdf
    • https://dm288.rs/slicice/file/jeputuwakatefuzeke.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd782d1b0a---75791943761.pdf
    • https://777mto.com/contents//files/94998687157.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef5479d016---gugejaduje.pdf
    • http://novussiteyonetimi.com/uploads/file/20148291103.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-14/20210514174454156497.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31effb7c94---ruxalatikefodinaka.pdf
    • http://ankamet.com/userfiles/file/10029079900.pdf
    • https://nonbodepsg.com/uploads/files/88151385166.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608daba8a39f0---sulanonizotitam.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e6384407---bebosokemibubuxed.pdf
    • http://maremio.ru/admin/ckfinder/userfiles/files/felawinewuwegigado.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ring+of+fire+pepper+scoville
    • 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_off0000e6a6.bin
13ff0634cebbe429670a511f8f553e44e2a334fa24dfebab944ee7fad6e63cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 10504 bytes
font_01_sfnt_off0000fea6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 16792 bytes
font_02_sfnt_off000116b8.bin
8326a662bb9b8096ad7f415d8e51742e050607ea94c5cfdce1f63f229674773f
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B8 18244 bytes