Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5254a2bcd311c9…

MALICIOUS

PDF

85.8 KB Created: 2021-07-04 23:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e7e6dbd3828064ebecfb7188660b9fb9 SHA-1: 70d3687be71c642b9c10464cde508d5b490f3d7c SHA-256: fc5254a2bcd311c9ba41f4ba971b03ed86e510ac6c9595267b3505b8e77158a1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/p0n6ku543uvlsfunr0kg14sakm/sidufijobasunofom.pdf In PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/walata.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210614174459_wuu8at.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3820ab41---20182591556.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/26786234217.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/785360907.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/97861830978.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/54048334b2c706bc15dd22fd9633cff7/14648937579.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/pg7mo7901hmbiqgsam72d3c887/xugivilade.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/xelazoramesasipelo.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/gujudo.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/lujiveruwakorivatekopod.pdfIn PDF document text
    • http://azizolace.cz/images/file/gafurejaxiketuketugula.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/6107242988.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fe5d369f7358541568fa343423ea4b31/4029607269.pdfIn PDF document text
    • https://samowar.ch/upload/file/barisizizekuvowigukajeb.pdfIn PDF document text
    • https://advik.net/userfiles/file/linejatopitapu.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/60297858541.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/loledapapokokefi.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/50736438177.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2d35c8fa33d9b4f853d93245a1594dbb/3083389567.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/vonolabofigigebutamegegaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=static+lunge+exercisePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 16948 bytes
SHA-256: a2b2e870d230a0b215af3337ae5b92f22a534c37c70461f540e692575f0d895c
font_01_sfnt_off000119ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CA 10560 bytes
SHA-256: 1f9359995040bbbde0b3f35b93a5204137b235cecaf4273f00f842fae74b1c87
font_02_sfnt_off00013202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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