Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df5f204cbccf5d0…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 06:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eaea84dfcc776bf67410424546f72282 SHA-1: f8ea1a92b06e9f7553596413dde53a38b20720a4 SHA-256: 0df5f204cbccf5d06c3130e73f7d9a8bc0f9e96e60ba57d849b606627b926746
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and link farms, indicating an intent to redirect users to malicious content. The presence of these links and the overall structure suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://chieusangducphat.com/uploads/userfiles/file/salodoniw.pdf In PDF document text
    • http://cnc-soustruzeni.cz/files/file/boloxelepudamipeva.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/60dc7bb4339a31fdbf67921b9b376791/vaxavirenexijetuz.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/5267164136.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/5945760453.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/66533196654.pdfIn PDF document text
    • http://mextro.de/upload/files/86454833762.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2c2337e159accc141ceaa6aebecaa569/58524619429.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/zatibunumimivibup.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/pitalom.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071514428023---fefazumadawakuzom.pdfIn PDF document text
    • http://simonide.org/userfiles/file/50912116371.pdfIn PDF document text
    • http://protok.pro/upload/files/tinibevofamodi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607658b9b1dc8---dodator.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/fabed.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/60742362414.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e89b88a9ff9---domoputa.pdfIn PDF document text
    • http://portableandcool.com/files/files/kozemasojusukanezodaguru.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba50b1907---25736508027.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a25dafbe8ca---73945706314.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/13867082427.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c00c83560d---nefajometikej.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-3/20210603025404914486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=toxina+botulinica+migra%C3%B1a+pdfPDF link annotation
    • 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_off0000d155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD155 11176 bytes
SHA-256: 97310beff6872d9dc97466472554f41054c5fa19e938dc1418b5ab206d1d8d15
font_01_sfnt_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 18424 bytes
SHA-256: 3eb91172bb55fa18b974b0c60830e8aa405856455fe35145d3fd53b77e2097ca
font_02_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.