Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fdad15f9c50847…

MALICIOUS

PDF

83.3 KB Created: 2021-07-15 15:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f554cf229f9978345404f4448b58cc5 SHA-1: dd41288ff8e6ff75514df8f09ce7991985e0f319 SHA-256: b8fdad15f9c508478d88cb3f4bd5116e140e29cbe2051120a0d7e8ec3e9bbca0
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites, suggesting it is part of a phishing or malware distribution campaign. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/q1j7ij865ddtnidb1s1bhl0bh7/peminobatulegikasigusili.pdf In PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/9508420723.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebadaca6cb---rokejaduzizejowedok.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/44963772470.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/xolosotenop.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/74608321033.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba4218cbd---gamigigapexukifigowa.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750734afa74---vemeboxixupamidupoxan.pdfIn PDF document text
    • http://blueyee.com/upload/file/280034172138.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/mudama.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7db9b785d658964703f06836ccf5c85d/budufupujadizotoli.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/q6dcknsvjv17d522t65puc1rm3/gikefugetuma.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2bda10c79bfa69d3b1084b17b07c6fa2/pipolakatis.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/xumudunegegaxizukaxe.pdfIn PDF document text
    • http://massimoandyuethui.com/clients/69227/File/10625737370.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/sekogiz.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/6967635046.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e63388334f7---tofosubasuxujunimig.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24181b26fb---62686790126.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/93858373825.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/o6tsc7urd39kafu2roemq8m13a/wotavegugolijotis.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/mibapiret.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/82949149032.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/jizovodokedukupusowasij.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/72050266077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+the+joy+of+creation+story+mode+apkPDF 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_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 17308 bytes
SHA-256: 4adcfd4450b2f2f8d1fe94f001e90038838720ed5d79e956002770b0c73cdb02
font_01_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252C 11308 bytes
SHA-256: c156a79a10a55eb6fe4e3742b3f9abb0cbe09791f26c402c3a1cb1ac17ee92c3