Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9706ff0fddceebb…

MALICIOUS

PDF

83.0 KB Created: 2021-09-29 10:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2b350379a65e72d3a073388fcedc29e7 SHA-1: b6be3bb7a94465a8edd61dca8d6cbe407f4d60f7 SHA-256: c9706ff0fddceebb6a1107426222013e992642665beef7005ab2be0c0cb73bb9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to phishing or malware-hosting sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://catamma.ru/uplcv?utm_term=dr+strange+123movies PDF link annotation
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/82808174459.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/66684294ac3a2688046428b51222e240/26156229040.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/volurazoramev.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/zexazonawagowurapibuwo.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/67096489669.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/dolipedisagegadigelifujuw.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/51148747002.pdfIn PDF document text
    • http://premo.at/userfiles/file/46708315289.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/uparosqinkko7909kbsnb28e0g/59672182266.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/pajisod.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/jirekijaloxoribowawalev.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/24149774310.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613920c6ec3e9---garabuwilulokofof.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/labimukifa.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/94322191262.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/vifobujamifidizisofawo.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153f12f92bf0---39465546586.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/mivezufufamadibedeko.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/99791436996.pdfIn PDF document text
    • http://preprod-proximeo.com/ckfinder/userfiles/files/45448024485.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/942163441614d397a560c2.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/15319914828.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021092103500093.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/tevisivemewuw.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_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 20496 bytes
SHA-256: 898b90e1cf56a2719543d9d2dc603e585bfaeabd07f5baaf030468b75ec3cb7a
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 10816 bytes
SHA-256: f14dd673144091057cef4edc877a4a8577c862fcaabb2610c55a9f07fd1c75e9
font_02_sfnt_off000126fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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