Malicious PDF — malware analysis report

Static analysis result for SHA-256 7577182a45a3f766…

MALICIOUS

PDF

102.6 KB Created: 2021-08-05 12:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e712fce24cf85fc75e1559e21c40e264 SHA-1: 005b90920c73947cf258c8c1fa9ca11d25ec1ce3 SHA-256: 7577182a45a3f766aaca2669dabf63034c936eb14b847a7e6c0f46551d1a9de7
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of a callback lure further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ngfll7gohuf32qdkmk4j65i0j5/burabutifujekazis.pdf In PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/tvuhr12kj2d04e26534ud4cv71/41414402817.pdfIn PDF document text
    • http://uhli-janmaria.cz/userfiles/file/11297817802.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/24011727979.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/totiziwakazozekagas.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/84206443445.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/5e7578e73d8075d6d3aaa279b2639a47/27522245864.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/bobunap.pdfIn PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/juzulagosawoluruzonuniveb.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/kokumu.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/jcnduig1nbs11q43aae6jtn5f5/8826303925.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/80030658137.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210526013228.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/46178b32a9d3d143a55514c51bba8d41/golulujorozubufija.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/45201831594.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/xakibipadigajuz.pdfIn PDF document text
    • http://apvn.info/userfiles/file/25502701731.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/17206332d70ee2a392d690f5ee64ae1a/degusivadozepilub.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/24513284397.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6c2086e2---giretokigi.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/damirusizunigesoniwizib.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/sibifelukef.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/rowide.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+xbox+live+gold+codes+unused+2019PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 18140 bytes
SHA-256: a476942f47b0eb4b28bb97397d134f817e1fd88127fd0df566eaa0e822d7dbd2
font_01_sfnt_off00014101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14101 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15918 11132 bytes
SHA-256: 349f076ee448fb4e6f0e0eb556712bf2b26539f19f08eb5c4b39c8ffb5761045
font_03_sfnt_off00017302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17302 16380 bytes
SHA-256: b8beba7bc30aaf363bc4bcd681f0f7e690d980983cf7837c7aa132f1e9b3fef7

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