Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d07cb11c6dd220…

MALICIOUS

PDF

72.9 KB Created: 2021-09-01 10:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bc402925ab02bcfd5fddec669019a963 SHA-1: faf458b4ee983d05aef5d28efab2b1ec99952d7f SHA-256: 02d07cb11c6dd220d9cb2b2341eb12f286f81db6adcb945de8dea1d538ea8928
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable domains. These links are likely intended to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 https://laborke.ru/uplcv?utm_term=unsaturated+fat+list PDF link annotation
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jp9c6408i31m9sauo5mohqb2k7/6734431568.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/71323815765.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/76710423433.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/posavajokupipazoga.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b09f955cd---wuduk.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1ca6d6755f731d4fb3e24e623b5ca1e9/labipiv.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/pinifesa.pdfIn PDF document text
    • http://web300k.com/upload/ck/files/46586184251.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8c0vnio3497v7q0jcnmqg21k9j/16959244038.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/demosujunewa.pdfIn PDF document text
    • http://poiskvod.ru/images/file/50435956963.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608d664588ecd---vipafavugolezil.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947969684b9---zamomozigewukabisawaravej.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-29-22-05-45-kVLNUc0s.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/75gbvdm58q89752c7f6oi2echt/rigudalivadavoz.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacfa7c7a31---72411173999.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/balano.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/pojuwiledovi.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210808075251.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/jisurawezitaziravu.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/gakuwepuwidikuvowifavo.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/63161b46acf9ea56797fb39e0490d3e7/zotiduk.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/94358666797.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/8f04f54a3bc7641ee9793642331fa7e1/39813682129.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/849119279.pdfIn PDF document text
    • http://contextuae.com/resimler/files/13836450729.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_off0000bf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF12 15500 bytes
SHA-256: d56446b93db88e330bb26403cc2322f568e7009b6945f97abf1c736d487eb820
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 10336 bytes
SHA-256: 1c6d6a90c17def67d3e03344d623e9a1186eaebcabc6e3ac5a086a33bf8a9157
font_02_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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