Malicious PDF — malware analysis report

Static analysis result for SHA-256 9962cf68d67f7a0b…

MALICIOUS

PDF

74.6 KB Created: 2021-06-19 12:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f60eeabfd55c2a4cc317038214daa5e5 SHA-1: de1c0dbed92f7bb0469d7e48685506b1bc3517cd SHA-256: 9962cf68d67f7a0bd3741925c9bbf697a1f78c3c6a52489ead2ff0e6203a08ca
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution, disguised as a movie download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/k13uogo1fli52u6v0t0kq26uuk/42752545557.pdf In PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/jijirazitivizikaduz.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a0e392b2077ffd90c4ecb0efe93572c0/66444325846.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607283c70c415---48603722558.pdfIn PDF document text
    • http://df-2.de/images/daten/file/gujemim.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a01367f2c8a---13722971031.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/9a6be571e891b588f77011941e185804/dekawonofako.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/7ugc906jdjhge40imcgb2l014b/lekevenite.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/9bcoc44jbnd6stf0inifcm0r05/90415731705.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f09480d3f---92700577716.pdfIn PDF document text
    • http://rumputhijau.com/contents//files/ditiwuxuverujojuzonori.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a5bd91d8e---dalekukatilafotivaweda.pdfIn PDF document text
    • https://arerp.kr/data/file/%5C/60935708160.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/xedeb.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/57401213778.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/u9bs2terrejbq1pugo6mfcebf9/zajedinolejoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=despicable+me+part+1+full+movie+free+download+in+tamilPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 5644 bytes
SHA-256: d032cae897f3edc48f5a78a1256448d8cc285d9fdfd91e13f088812dc4b29cfa
font_01_sfnt_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 10736 bytes
SHA-256: dba8cf8f535a69912f93fcf7bf56af19f583dfce7411e22904d118d7c8ac34cb