Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ded297f117ca0c…

MALICIOUS

PDF

87.0 KB Created: 2021-09-03 21:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce1b8dd84864dbc634578075abad2a63 SHA-1: c7991fb275771ad9abd072ffb450b421bc86955a SHA-256: 14ded297f117ca0c7f606cd2f224c24f6c443584460a14ac8d883c6589e5f568
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://michelschuurmans.nl/images/uploads/file/tufofolemomunezamepiponep.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a772827c4fa---15005877214.pdfIn PDF document text
    • http://www.heksan.com.pl/file/nufusame.pdfIn PDF document text
    • https://bursac.net/userfiles/file/17071914794.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/tpa61scobcv3614c6aea6tq7r6/85819544788.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce6d2795a---fimozopup.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/lemiwimugunozolawitaxi.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/lonowazosolodum.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/ec94f3cab53c990a3083f0ca4c6ea530/visufavovetupabafune.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4ee01121cb408ef1837cac6fdde168e5/75976045095.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae9ca19d9e---49077435600.pdfIn PDF document text
    • http://fotobambagiotti.it/userfiles/files/bosevugined.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089f5b8ee1f7---84404539631.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/64970576543.pdfIn PDF document text
    • https://dietacud.eu/upload/file/53005977434.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/64800948345.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/5489103530.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4a58619e1---70671698862.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/82594073357.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/jepojedox.pdfIn PDF document text
    • https://euchebnici.com/img/file/tubaralexofiduwuzo.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/1676944585.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9vtq5fntash0aqu6ubi9r17el3/wirepob.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/neajpapa6jmvktk0jd4n46v2n6/65849590709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=handwriting+without+tears+teacher%27s+guide+pdfPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 18700 bytes
SHA-256: 5eb5df960caceaad5016f2ec85ee4ade53d1c847cb3029a2535032a3632337ce
font_01_sfnt_off00011c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0E 11064 bytes
SHA-256: bed4e2adb7730a9b15a4b2111b8cb8caa7de1c90773cfbbdbf2d8426d0f133b4
font_02_sfnt_off0001359d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1