Malicious PDF — malware analysis report

Static analysis result for SHA-256 054b9fd962f28ad6…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 11:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e141705713ffb7f58cc7ff8d7b6f008d SHA-1: 391596021dadeffc9175394ac8f6f2e3edeb107c SHA-256: 054b9fd962f28ad6c264905f889d90a8bf04ec865767195ca98475cafefdfcf1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous URLs pointing to compromised websites, indicating an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable hosting, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130737250a19---71219207256.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/85810448392.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613011058e18d---81518883415.pdf
    • http://www.siposferenc.hu/html/83388267617.pdf
    • http://messtores.ca/fck_user_files/file/memipoziketiperi.pdf
    • https://vyaspublicschool.com/ckfinder/userfiles/files/wudidipelikakizifisufi.pdf
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/31521725820.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/tasarodabadipit.pdf
    • http://detikakdeti.ru/img/file/66092740900.pdf
    • http://phutungotodungha.com/img/files/fewurudawuxaverixoj.pdf
    • http://vektor-bezpeki.com/userfiles/files/90356889777.pdf
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/galutemuvijopabuvikokutox.pdf
    • https://tcremich.lu/files/files/tunipobiva.pdf
    • https://agencement-menuiserie-var.fr/stockages/files/21916619495.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0c8a24a575638550f5cc75c2988d9eab/vofagipima.pdf
    • https://iamtimeshare.com/userfiles/file/24240552796.pdf
    • http://incomingmakedonia.com/files/files/96746490836.pdf
    • https://indolabtek.com/Uploads/userfiles/files/vuxikekebexoguf.pdf
    • http://jocoseatee.com/userfiles/files/demabonanexuvepikitu.pdf
    • http://sk-massimo.com/js/upload/files/xokupevagagozigaxop.pdf
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/seloxawogupag.pdf
    • http://panziofabian.hu/fck_kepek/kagabofimefutirusisunabu.pdf
    • http://novafish.it/userfiles/files/todeguxenuti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=jarvis+ai+pro+apk
    • 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_off0000b428.bin
00884d9641aabdc44989abc85c1e164d3cf6ebe3b0521528fb78e60d4593e60c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB428 10012 bytes
font_01_sfnt_off0000ca7b.bin
08d16d01ef775313ec4d2d60f9e3aeed0f8f4ee5a36a7e5396b98eee0621e6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7B 18124 bytes
font_02_sfnt_off0000f92f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 16792 bytes