Malicious PDF — malware analysis report

Static analysis result for SHA-256 0290b85ec668fe3e…

MALICIOUS

PDF

87.7 KB Created: 2021-08-01 08:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 84c2fad4dd7e82b68dc0f76430693867 SHA-1: 96b18a74bf5387a2cf0d6c6c07dcdc5934486a86 SHA-256: 0290b85ec668fe3e378c659e7b002f74fa2818e6f29f9f187452eda91b067cd9
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://greece-ex.com/images/blog//file/javupulapifirulelewuzaruv.pdf In PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/94071993307.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8845ac693---wimakovakaxodipu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070693c90bbe---zunezivuputumu.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/11346210490.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/256cfbc497ee5f2df0601ee3428086f3/85457382117.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af9df0b7441---vuvogajubezibim.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/pewowonijuvopoxifa.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/82841898686.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/nolugomepezinoxawal.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608721b548097---78545068129.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/81035bf4b02e5647a81dc5848bcada44/97641886502.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/97914844775.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/wukutuxew.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/dugufudon.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41171f9d9---94000099315.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/89810510840.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607d21cb231e0---pidabovojatituvupu.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1831c391ed---wutixax.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ba282357b84b001da716fab3f9baa6a7/delulopitofuk.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7ba00d5a7---figufatetixuki.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/occ7ign04hr8hpv2i7n7hgp9s0/40821173084.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/bemufepew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=why+can+my+iphone+not+find+my+airprintPDF 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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 17580 bytes
SHA-256: a0fad22926172277a905c91eb39f03ca802f8173a0cf21e7f63dd68b6bba6e4c
font_01_sfnt_off00011e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 10776 bytes
SHA-256: 71e73d7f5a59eb546a7c3ec4903dd5788e5c8abe17069d15d7ff10ffcde8c628

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