Malicious PDF — malware analysis report

Static analysis result for SHA-256 983eed1254371ccb…

MALICIOUS

PDF

83.5 KB Created: 2021-07-16 17:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33a3bd16d7d5f34b20a66f53e2f2079a SHA-1: 738f2c3093b424fe7212eba8bdd58eabcd1f4531 SHA-256: 983eed1254371ccb2e9fb8e2c6cbf1c78c5341d0f34ae5de64bd6df35553a949
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file contains embedded JavaScript and multiple external links, many of which point to compromised websites or disposable hosting. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or session tokens by impersonating a multi-factor authentication prompt. The embedded JavaScript likely facilitates this phishing attempt, possibly by redirecting the user to a malicious login page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 https://astek-telem.fr/userfiles/file/96019531558.pdf
    • https://camgloberealtor.com/userfiles/file/tovomuwavezudedokevibor.pdf
    • http://fiumevivo.it/userfiles/files/nugimuvalokabulevanago.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9ab2c6fe7---jitom.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/58389559692.pdf
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/f94e97bda8248220d3794a823bda46c3/22067803571.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/52088e3615f55cb047168a740092baba/jumaxusukafovufofedavem.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f329b142cd---37176927374.pdf
    • http://adveotec.com/img/file/migubuxogirasobu.pdf
    • https://bevelec.com/bevelec/dossierMois/file/37865679243.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/db0c3d6a6b20585bad2e7a950b0e577f/pugivugagukewirutu.pdf
    • https://emauto.lv/index/images/up/file/23416784517.pdf
    • http://artecgroupservices.com/imagenes/file/kugikevipowafagazejap.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8c5de769---fenawezedegebajabu.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20b6541ab---4503897875.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/44df23e1f21a5af55b6d4c640a89f187/17489209134.pdf
    • http://podhoru.cz/userfiles/file/zajajemexe.pdf
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/5655096262.pdf
    • http://hattingtoemrerogsnedker.dk/userfiles/file/kovarudakes.pdf
    • http://europavloeren.nl/siteimages/file/nefixexavog.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2aa7ca11c---talinezubuzali.pdf
    • http://www.bufolari.com/public/immagini/file/26514149855.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e22838dd07---76159880664.pdf
    • https://abugfreemind.com/userfiles/file/79049902476.pdf
    • http://accessiblevehicleservices.com/userfiles/file/12426517838.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=closed+syllable+word+list+4th+grade
    • 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_off0000e204.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 16792 bytes
font_01_sfnt_off0000fa1b.bin
97c489161b4db9d67c871b46da2cf811df92a56014854a8594999d4815cc5f41
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 10872 bytes
font_02_sfnt_off0001134a.bin
e8aa8cb4a1a533a09854876b021fca067d534c57a913b6ec44fa552ae0efa1ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 17436 bytes