Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc9823eb783d2aa…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 05:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d12edb4d0db3bdc077ce003b9ab13c07 SHA-1: 396431c7869911f90f4c5dcd4c575ab50ccb9c4e SHA-256: 9dc9823eb783d2aa8f22f455cc97ba34df27f0479ef6b02221840c2bcd6f4610
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm, coupled with the nature of the linked URLs, points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=texecom+rkp8plus+led+keypad+manual PDF link annotation
    • http://rbtyutj01.com/userfiles/files/61093704852.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607081f686ecd---tumovimo.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/sulatosasiriz.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/devefagagiluzawiza.pdfIn PDF document text
    • http://evola.it/userfiles/files/mupikud.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160add792986eb---64220937605.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160df2bf5e2d1a---xizovizuzavekavifexawe.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090b7d4b8d31---keboxujavifuneguwu.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/fadebur.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/16872003248.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606de8c7b0ef2---68952166690.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607906c41e4a5---40150170211.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/68726264727.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075ff5529bff---8285451534.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/gadubig.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756409db6a1---52824097342.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/94478832067.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/4339366433.pdfIn PDF document text
    • http://unseretochter.ch/images/file/jasovamisuxugol.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/derudunewig.pdfIn PDF document text
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/41831682720.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/fusokaxakuba.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/63779047384.pdfIn PDF document text
    • http://fotossc.pl/_files/file/rowiwegebaxipefotomos.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2391bdea21---mowonelilupesur.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_off0000ccab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 19420 bytes
SHA-256: 6a1a7edaf1c0e86104870065835ecc119bbeea96a5860b73f2c80b5b54c75054
font_02_sfnt_off00011696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11696 11064 bytes
SHA-256: 03d648b950630e382c393c82d80745c91cb02c34669daf8b5410a622bdba156b

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