Malicious PDF — malware analysis report

Static analysis result for SHA-256 3310ee033154c29c…

MALICIOUS

PDF

65.8 KB Created: 2021-09-11 04:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 88b2b3456597d2ba5f9781d6fb81e323 SHA-1: 0e221a7632539b844d92931e3fd1be9330b4a585 SHA-256: 3310ee033154c29c19624166c8bd8aa9ff8b9a09ac3b3fdaf0d1da8102d54093
154 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'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=the+road+less+traveled+summary+pdf PDF link annotation
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/28813373444.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133413865368---lijulizoxanu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8da6591e5---54964468116.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/13d17071c23bf6c83c9e1ddab4b12415/tigirozoturumika.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be01ca362d---pinujikol.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/dabigabijefuvibuletemine.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/sukafodubodesasategoli.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/tuviloputewujuw.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/82744676645.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/jozetabotomelifexupuxiwi.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/patifole.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/92693113091.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/84730169764.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/digotegowupowukul.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/zulibonevaviwafajopomivog.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16134ab0e65ec4---85371467373.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1c5bc2a3d35815cfd1439bc3ee45ab70/jawere.pdfIn PDF document text
    • https://interconformity.ro/images/file/43314140311.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/56655067057.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137983c789c1---50192736271.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613733244da3d---82086077844.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/53978343085.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/vatebop.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/13106566185.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 10812 bytes
SHA-256: fcd0f8247adfaa218fc6251dad177a989b30c6410fb44986a7f10c3dbb716391

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