Malicious PDF — malware analysis report

Static analysis result for SHA-256 14552df7284cb385…

MALICIOUS

PDF

77.0 KB Created: 2021-09-02 10:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e9aad2179f041367faa3fd716ae3602 SHA-1: 773a13b198508fc7e5ba74bf639d4a7f5a3a494e SHA-256: 14552df7284cb3858c9cffa6fe489dd9c195a337c8b7eb7707837fbfd881dab0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised CMS uploads and disposable hosting. The presence of numerous unknown URLs suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/d11c9l55m6d6m07aupe8rcnp67/94871121353.pdf In PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c47a0d12---vurevajowaputosuruzava.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/61375880660.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/fn2om0jgtfj9gftaohipfdrhk4/50504789998.pdfIn PDF document text
    • https://wodgluch-projekt.pl/userfiles/dijanigikifos.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/mawiranufosinavebufosi.pdfIn PDF document text
    • https://wineart.online/userfiles/file/51250670453.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/0olvui9v2jr5jct53dt7dmulq0/bulajub.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160734f072ea66---pulubanimepusesuxed.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/33163316162.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97ad5a0ec6---95644943120.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/tafafux.pdfIn PDF document text
    • http://allasclub.com/campannas/file/xafosi.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/kamiv.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0468338001621899994.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/dekakodatarutosuge.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/luwides.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/80851967846.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad14c52340---webetalodufi.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/90695158144.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/64448246176.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a4377b57---57937929001.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/39459758951.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6867b5314---gebix.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/jaxotix.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/17560432683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=eamcet+exam+date+in+2020PDF 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_off0000c5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C8 10424 bytes
SHA-256: ac7cf1394d02d88b0f60ed898b1b554abe18edd537201205c2620c4d4e87cce8
font_01_sfnt_off0000dd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD73 17816 bytes
SHA-256: ce5938862ddc26b60ac8c5424641701dfa403784b3b3dd02ec9085504800e0b4
font_02_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1