Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c95f73e81c7d73…

MALICIOUS

PDF

88.0 KB Created: 2021-10-09 03:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e9a38067b0ea0e4c0f12031c325ea0b5 SHA-1: ce0e9da74c4eadfb0f6ab7a9cb6e14ece8f8b1a7 SHA-256: 08c95f73e81c7d73151fec43f436eedd57b11dffccae4d46ad998521e97e64ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous embedded URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=ongoing+dizziness+and+lightheadedness PDF link annotation
    • http://gomsuhoangminh.com/app/webroot/uploads/files/71247104001.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145fc2ea0436---61602583169.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/67248594628.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/93022152266.pdfIn PDF document text
    • https://ikima.fr/uploads/file/61767206782.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/33851497960.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/30255437517.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/53236490254.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134653304a5c---relilititisofosuwupuboso.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/jopibus.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/86540924630.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/pirawulibelimofa.pdfIn PDF document text
    • http://chargooshads.com/images/upload/files/12983433747.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210914_8E4C9D8E3ABF0517.pdfIn PDF document text
    • https://linker.tw/files/vevukavigenepavixevi.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/62502008588.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613e365299005---20714571919.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/mogupukopivetoxatawozi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e23121a700---34185518032.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/99998999899.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/taziwalusemedezux.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/61800326147.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/merisajavamer.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/volapaxajutaxakevalifusuz.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16153bff06c7e4---nebutadavo.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_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 19684 bytes
SHA-256: e9b9549d3ffb3423b455a309bd847cf31563f378ffb9aa91f4f9f53489a91547
font_01_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AED 10512 bytes
SHA-256: 1c5a951649259b26dac694d8f6d7411808a8f1f33d635b8ce020d2341c47aa4d

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