Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e4944c9e961fed…

MALICIOUS

PDF

74.6 KB Created: 2021-09-22 22:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6ac979e38735552b048e298497ea7b18 SHA-1: f0a8cef67aa485583db838e4fe084acd5eba6571 SHA-256: c6e4944c9e961fedb3fdf4ce3debafc638cc50b9626eccaae9671ac35fca0b95
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the presence of numerous links on potentially disposable hosts strongly suggest a phishing or malware distribution scheme. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for unwanted downloads or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kadh.kr/bobod/upload/file/dejekodevotadezapuw.pdf In PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/xosiworojatizu.pdfIn PDF document text
    • http://ijfbn.com/editor_up/ruvezesopeboxunomulewa.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/82097503392.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/bivukuwodiwaresirofiloji.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/98625103691.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/5462998544.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/dopifusogilade.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/lukezogubuwelawivibezaleg.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/futinawo.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/92074329890.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/25327783702.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/07226d2c03ce88125baa621b63a99412/xunepaguvurilekikir.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/rotoxixifukugesumaputew.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/64082169323.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161426e8f4f809---50158648786.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/zamalit.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/14157892200.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/4132873296.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/66146368583.pdfIn PDF document text
    • http://contextuae.com/resimler/files/89263376537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=gta+vice+city+free+download+in+mobilePDF 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_off0000c15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15D 16396 bytes
SHA-256: 1bdace2416890c35df4dd99ae67088c50f60f19e9055a226c76cd195fdfb3522
font_01_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 10912 bytes
SHA-256: 6ed21ccb2c1ad06fc3f5561c038005f43a1373231379d76fa08c9301fe5c0d00
font_02_sfnt_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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