Malicious PDF — malware analysis report

Static analysis result for SHA-256 202edb6c87572193…

MALICIOUS

PDF

71.6 KB Created: 2021-09-09 10:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bad9054cb2eaf8bf48155d7b54b9eefa SHA-1: b3b26ffb57a66ec50df651f7aa8e80b32f77c534 SHA-256: 202edb6c8757219363b2d1158bd67d6221a022228f12ab5140b13c4f8bada32c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, presenting numerous URLs that point to various websites, including those hosted on compromised content management systems and disposable domains. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://arohitourandtravels.com/userfiles/file/zamewegoxawep.pdf In PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/97178508829.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/dawonagakovar.pdfIn PDF document text
    • https://invision.buzyhub.com/files/26459450037.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/50904505053.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/19f36269c3f67398bab98ba110974367/neludisosuwesepamat.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/lujelavibi.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2825940482.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/bugapovogujorujux.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/bizidoloranorigagik.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/kajazifanek.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/91641327468.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/rutolerefozasamo.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/vazap.pdfIn PDF document text
    • http://sql110.com/pic/49507911206.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/10731771455.pdfIn PDF document text
    • http://liily.jp/upload/file/20210903072314.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/92115793885.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/43778745896.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edadeeb777---21324320506.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161362eb7e3506---12463534135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=european+war+4+hackPDF 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_off0000b883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 10404 bytes
SHA-256: 8d64a29be574a4c4c3e148ffa9cb94c54b0bccb959dff1bd26d61c3f265a1b61
font_02_sfnt_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 16124 bytes
SHA-256: ba85e6a86318d0a23f97380586acd7fc9df34c5c906a721ba75a111b02130c20