Malicious PDF — malware analysis report

Static analysis result for SHA-256 d129591971dc8f55…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 14:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 979a7ff3570de790096afb839e966bfe SHA-1: 8a75059ce1c0beef68179da1f863ff991872e022 SHA-256: d129591971dc8f5512e13508fbce5e89aeb0d7cb5901577f51ba8001abcd8b6c
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 pointing to compromised WordPress upload directories, suggesting it's designed to distribute further malware or lead users to phishing sites. The presence of numerous unknown URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098581628599---luvezedevusatur.pdf In PDF document text
    • http://aps-mes.com/files/file/malewifajasarer.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d78e49ed5ab---lemomi.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/mazisosutiguxisupilow.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/kanitem.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/kitogisepexikadesovaxudib.pdfIn PDF document text
    • http://novafish.it/userfiles/files/38116728597.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/rd30vdkfkgp7rn4g3jhah0vlak/62877047518.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609172279dcd4---nitoxonemazulenej.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/tepetukawowepobetobazad.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428204645139.pdfIn PDF document text
    • http://epmachine.ru/d/files/15877457126.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/fobivukomekagevurometow.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210822145540.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/bijelu.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5920c7b35ec81faf29d9c80a25ca2e10/xabanatej.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16075c71a3d996---73806730706.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-8-26/20210826013736558742.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130046669408---lunepowazupa.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/11346793382.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/fasedejeka.pdfIn PDF document text
    • https://sce.tw/uploads/files/60e7f6a2b3da0.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+emissary+elect+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_off0000c592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC592 10736 bytes
SHA-256: 2e0b449a4270f0999a21ad87997340e2f2a47493bdfca1ce3b13d9a609ba8c4e
font_01_sfnt_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 20292 bytes
SHA-256: 2d9cd390f1c2b4acfd2d8bf2451d29f2845ca5eba112752cb744eeaff7c50169

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