Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd27b5910c4c01d3…

MALICIOUS

PDF

77.2 KB Created: 2021-08-11 01:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2b3cc3daae43d1f49f22a0b3d6c9e891 SHA-1: fb2479b9fd6744e7adcc55a57c191c6c98c1e284 SHA-256: fd27b5910c4c01d336a6c692bc4a4cc8a53126130a0fb621bad8a37f476a00da
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://murten-hotels.ch/userfiles/files/64960624493.pdf In PDF document text
    • https://amitadevnani.com/userfiles/file/giginekesuberubokofifame.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/jarodokaxamalegob.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bc305ed8bad15fa2b1af4b26e1e2588b/67327622184.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/16900953620.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/cec4d8c08e2c91cc4337a3949be22d35/fopakebibu.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/969e45de0c9ce7dcf94584206fc821e6/bejapokexinenibal.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0db68a989---91007950602.pdfIn PDF document text
    • https://termofriz.rs//files/nogikewilisirowubutodowa.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f798293a6f---kepazaxotuxadodazu.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/79191586153.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/mejivofat.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111a6013c493---5841046045.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609474506c856---67955453116.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609faa09d16f3---61955607527.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06cff04f00---11606903911.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/worevelalakuduw.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/3744003978.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bac1f3ad1a0---83399338513.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/20828678934.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/jtt7392q1va99ejslvuu7utfpc/lalutarabupagir.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/zufegori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=main+tere+ishq+mein+gumrah+mp3+free+downloadPDF 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_off0000c819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC819 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 16844 bytes
SHA-256: 11e0bb520ba0ccf2611336f65be36b0f39e0345801a981dd62bec5b39cef862e
font_02_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 11444 bytes
SHA-256: 5fe803619b59ce9dacc38dbed950f9223f82276e3b622227e3a1c234d32eab86

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