Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fac450ceb743889…

MALICIOUS

PDF

77.7 KB Created: 2021-09-03 23:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5dfed51fb1f2e56aa300c383d49373c9 SHA-1: 242a14c6c6092b0bcf50c440fc2b23f3e3a8bb0a SHA-256: 5fac450ceb743889b8f04247bba1c874d3fe4d80f1e774a1490ac05393efc4ac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into downloading further malware or engaging in phishing activities. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://irlanc.ru/uplcv?utm_term=analogia+y+homologia+biologia+pdf PDF link annotation
    • http://inglewoodreunion.com/clients/68690/File/47035266134.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/0daf18dd82de539f6327388be5ee484b/seninovolarixuvamega.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/188b7c2c73a8c7c8fc77a214f3ee48a5/toburipagasolebo.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d5a62fcb---xexeviwudiza.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/64649134548.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d517f7e732---11376507048.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/45706587934.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/guwedivozom.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/41843680728.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/26037485963.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35d384601e---pakajefo.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/k333ji3li93aj95kl77shplto4/4536473394.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/14507154044.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/raxazefepa.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612cab593d076---30997206650.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e968b9d30c---63755568698.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/xegotetepem.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/3531991126.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/tkaqrvl93etbmdnv46er3hum7s/tejonorujenojasaxabam.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fe1b558fbe3---29137536173.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/057b1e700e40e0381c7c11baffbbc8ad/risoxiwu.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/bodibuwos.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/jedamorisir.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/dff771bb066fb02411ae245cd43d69db/baxururad.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_off0000cfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA1 16460 bytes
SHA-256: 6c441f6b4535428b9bbe3bf49ee225a6514b0872ea3ff1ee09c2b6f4b0a36c89
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10684 bytes
SHA-256: 0516d58ea3f738b9e4fd54625d842c8c0efb634868b2ddbd5fbefdbe67585c45
font_02_sfnt_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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