Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eed636308039ed4…

MALICIOUS

PDF

80.0 KB Created: 2021-06-28 08:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 17d689eeca5725d5eb90546da2e54e0c SHA-1: 6f8005ba434f6b886edd3fc6d35ef2eedf83c939 SHA-256: 4eed636308039ed4e423e3366ba342c78a243f90528900f0c9974540743e4cbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URI heuristics and link farm indicators reinforces this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://garglob.ru/uplcv?utm_term=accord+euro+r+cl1 PDF link annotation
    • http://nhatminhtrading.vn/app/webroot/uploads/files/zawodojovose.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/a8ba95b2339f69780a984dce580dd440/83217266758.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/97988630207.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210607130137251.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d50ab4972---xifewela.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/64042163044.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/t6i980igjvb0egr4c57jjdvn4p/69916658665.pdfIn PDF document text
    • http://sivam.pl/files/file/mebegorifusasu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3cf740914---xulupixagiwu.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27607f233---99639253647.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/nibofujexatigikowoze.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/26142723338.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///73799802661.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/sisoxiwiragemasojesavago.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/r2705urs9bn7fhe363ml03dbhg/22788984395.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607223f624e5f---bubevumabok.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/132c861f27c2c684c1aace6e67e8fec0/lutepedelokozid.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/l8fktdfi9tc7lb54hf11v1oiok/fitenaseki.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abd2f926b0d---64666150825.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/pbge0btnfq8klpt4l3jh7cq3c1/71099912527.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/jusirezoxozamusubew.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d178cb230---19661552058.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3c6203336d3a96186ce83fe67845bc09/gakijet.pdfIn PDF document text
    • http://shosholoza.de/file/4758680676.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/d1ark0cu8eiq1ruoih7oun67s9/17549145364.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3754ea6d956c71d8f5f079267a43b541/32401657001.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed5744ecf2---moxitegikonaf.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acab2f7bede---rojodibudukokukino.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD815 17116 bytes
SHA-256: 2ca3bc4be2ab547e1abb497beea38804bac281fdffc85ff19ccfe24962defe04
font_01_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D02 9872 bytes
SHA-256: df9919811a0414c69457f6e9b214c877a20f975b7d28a055f5f3025187d890fc