Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54aee5a165ec4ad…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 02:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ab9f0f5a9688a95d6efc5fa9cf1d983 SHA-1: 241c74d2d6dd6b95c88e7fdcd18a6ec14bd5b94d SHA-256: e54aee5a165ec4ad733c2c75c97473bc322acb2d78a3529ccaa5ef9e4f710ea8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a campaign to distribute malicious content or phish users. The ML classifier output of 0.994189 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://archism.ru/uplcv?utm_term=programmable+metronome+online
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd19644c5---mepemazipojoza.pdf
    • https://clove7.com/userfiles/file/xevejawugurezeb.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7f3af5e26bcae296b3fac0cdaf4c1d55/goxelapifekapazenexaka.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078f556e2f0e---5346794216.pdf
    • http://skolicka.eu/foto/images/file/vumakibulore.pdf
    • http://shukokai-voves.fr/userfiles/file/83358255786.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4801dc90ba---1441411859.pdf
    • http://misosmile.com/upload/editor/files/bigojegik.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608918d8ac8ad---dilojoxem.pdf
    • http://qzgj.cn/upload/file/sifow.pdf
    • https://hospvetcentral.pt/site/upload/file/36548637961.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/i2ml8itgl26aij00tlbevne9p0/xonomexekit.pdf
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/93094491226.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/5125375c380c290799b06749fff4e155/noreditisatoname.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46dd6d262d---vuwoxujurawejo.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/993311a0124234b4eeb680d1ddcd117a/ruxifaraxuwi.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7dc1328ff---gekolamekeludedolaxumenew.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/bcec215ab64a45f6d52546170975cc1f/95439332957.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb4c398cd6---fuwerowibika.pdf
    • http://alarcon-v.com/editor_upload_image/file/17014029362.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/rai8dumvs70cckjddabj5s5l78/12672491127.pdf
    • https://vivekanandbawwa.com/userfiles/file/5001418402.pdf
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/8072316027.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311f2a742d---77044343007.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab652cacd7e---koduraxiwisi.pdf
    • 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_off0000ec2d.bin
b77630a4ca2a4a4596c97958d32799794504c4a059392fc649e4b6ab9d474342
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 10424 bytes
font_01_sfnt_off000103c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 16792 bytes
font_02_sfnt_off00011bd6.bin
bceb38776460298c9b79b83d0db710abc69a29b71ed0ff3dec98a24d8c378634
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 17900 bytes