Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cc9bb304e2ab20…

MALICIOUS

PDF

79.6 KB Created: 2021-09-08 10:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cd9e63b926c68b313d46c853c908f6e0 SHA-1: e2dd98f411d763d771b3ff0045cca8195403d923 SHA-256: 95cc9bb304e2ab20533b6882b8c8f2c45c02a00b695d7e73865bfa94ed8f4cd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are typical of malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=miele+upright+vacuum+cleaner+manual PDF link annotation
    • http://cyuanmei.com/userfiles/file/70694530357.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2ij10cuk86j2h0iqi6i2cl2rv7/pesiwijixuvejufopuximisef.pdfIn PDF document text
    • http://iltorg.ru/upload/file/ziximitesojig.pdfIn PDF document text
    • https://7gking.tw/upload/files/69454982782.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/1079089716acd942ee152456c768b86c.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/kewadofegakubojukovizipo.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/mewafad.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b4956393d02---kuvexisemolunevu.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4fe57d79d---83783203360.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160e336683f333---68699068331.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/8982679198.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/48085443896.pdfIn PDF document text
    • http://oklogistic.lv/upload/file/5008078927.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a200e897dfb---nutexanuvutumog.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/nuvorowerukopon.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/ligesi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a36d22b4c54---gojerefugagubepaliled.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/kabebu.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/20128735263.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f161ffb9---jufotujazapotazoxebuman.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/b34e6ac18106e34c270a5da7fa3bcb47/lezusirumow.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/43d9b7eeda6f56b1dedddf90305cb13d/xelosetozimag.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/bazevifewasatirexozuwas.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/22958942124.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/40218349398.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0f2ffd485000a338a94e3a6855b20b8d/pajorebozizifanekopakoset.pdfIn PDF document text
    • 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_off0000d2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 10692 bytes
SHA-256: 655f6118461a62004052b26b932a3a41a7e43e2574755cf0cd2e5076333a07a8
font_02_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 17648 bytes
SHA-256: fffbdf276defee87ecbd557f56e566d38986a0acbe8ce9fcf0365291fac79265