Malicious PDF — malware analysis report

Static analysis result for SHA-256 675005697980e913…

MALICIOUS

PDF

75.8 KB Created: 2021-09-02 00:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 62ec6bedb200282dd5c0713ebd4b37b9 SHA-1: 07806fff2218c0e22c86b8f1183b07af34de2087 SHA-256: 675005697980e9130e262d23884f30ef8dce931d74ed0d146294f95a8494c8a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting other PDFs. This structure suggests a link farm designed to redirect users to potentially malicious content, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0476e8e9e---99955662719.pdf In PDF document text
    • http://campfirewtx.org/userfiles/file/jesanawikujaziza.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/b9944490c86a9ba0736079a1b96f2d33/tegarivido.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210529_DF871F558C9801F2.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a50e702a473fe1e795db0fd6422508a0/zegalijogezowajujovaba.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/99427819972.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/9021444390.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097cd94d8053---31189632944.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c005d39c8---27068656582.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb4ef27e1---fofuvonod.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f631254f9a4---33145997286.pdfIn PDF document text
    • http://word.mn/uploads/assets/68564454764.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b99d0ae5a1170637cbe9ed13845c53b4/guzetolisuvefekif.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/sidumu.pdfIn PDF document text
    • https://datajournonepal.org/files/zefemisabotulobakuvupuret.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/wozezabudakagixifed.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/76360985544.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611541750d2ba---megudug.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/zeredelibovavexodaz.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/vilegolevaturele.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090387f9de11---30058399373.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/wamurijotagisizerefaromum.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/fovivunokadivimaraket.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+many+shots+are+in+a+water+bottlePDF 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_off0000c78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78B 16000 bytes
SHA-256: 9107d3edc40e42adbc47bc2ebd485211834f97879baa508180b526fafe3536c0
font_01_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 10704 bytes
SHA-256: 0299279ee0f900fd34d758a89c2a85c505d54858ea92a0a53054c8573d7515d7
font_02_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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