Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2069d2cfdf4c2c…

MALICIOUS

PDF

101.3 KB Created: 2021-06-29 11:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 98b644314e1d321ee70326a73999db15 SHA-1: 93fdc0d0ff76f2ce15927c7861cd838a0b6ae003 SHA-256: 1c2069d2cfdf4c2cd6b6520e48a67e4aba2b17d709e6f0b430102779c1dd1fa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites 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 via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://archism.ru/uplcv?utm_term=fnaf+4+free+android PDF link annotation
    • http://51-lq.com/userfiles/file///63818611569.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/58602127869.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/60072322653.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/vivan.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/60d9c85457d6b89290d1cd229677a871/vopulorepowew.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7d4821791117bb4c85024616b3762ffe/66768700887.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f38f3cbf4---monexatozijutoj.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/norus.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/171206f903c71819cbc17d94a10471aa/jojovexuwanepedokufe.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/i04go6g3idl4i4h9bbbj8c2fol/7241044402.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729c7ebc38e---18044541418.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be93a9aa606---zogutepumamaruvugivan.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609451202c430---78131856891.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/160759375753.pdfIn PDF document text
    • https://equinox-e.com/upload/files/65550598056.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7dc99f8ef8f808fe18b8ba23dfbd69ea/zuzikavexuwegopuwetoxaxov.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/lovoxofovatazu.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/79286b68fde64b1a72a4b8198a916869/bidogelexorozobozu.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/hdr7nmec42g43uc5ji9qks12es/rapiniruja.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/temotopikopepalidipilez.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607133f56c637---25377257837.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2046b73997---4436839636.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB2 10092 bytes
SHA-256: f97a49c8b74f0450b97e4e4ecd0ed8f921a9b59e653184cdc456d73032a97638
font_02_sfnt_off00014340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14340 17480 bytes
SHA-256: 27402f67c69d73e1ae497caa77aeda5f6ba2ff151b84565e95775d890cd6176f
font_03_sfnt_off000170e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E7 16640 bytes
SHA-256: 67cd4328d5fd6e9134f1b1c85b1680a1a932e20a6f130eb7c914dfd2913d640b

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