Malicious PDF — malware analysis report

Static analysis result for SHA-256 662e94686d5d1107…

MALICIOUS

PDF

280.5 KB Created: 2021-07-17 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3bba4c31f7a177737b9770b7d5e52d5 SHA-1: 33f742054726819b7c76853c94875676566aefda SHA-256: 662e94686d5d110775c822082a20b6e2f7168a8b5423d54fc5472663f055ae85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, with one heuristic specifically identifying a link farm pointing to a compromised WordPress upload directory. ClamAV detection and ML classification further indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content hosted on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dd2eb6521---xeparazetavexofudaten.pdf
    • http://boothbayharborshipyard.com/userfiles/file/nupejov.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/kodesukalodifinewefu.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/fc7ee1a7ce89a07aed9dbed83c7e0783/23846967541.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cfaab0fef---67584561072.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a333e68799f---64473506512.pdf
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/87684220916.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728d488c685---70763958434.pdf
    • http://geostudio.eu/userfiles/files/sidexedipavop.pdf
    • http://podlahypilat.cz/admin/file/35756046887.pdf
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/79810618039.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/66671201431.pdf
    • https://aslimitada.com/userfiles/file/82460447882.pdf
    • http://duonglaohanoi.com/userfiles/file/pimag.pdf
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/tipuku.pdf
    • http://grandinhr.eu/images/user/file/31949644695.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe66c3474d---jifuputam.pdf
    • http://alexlunacoach.com/img/editor/file/48278997420.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b143a916a93---fujewesukuzabema.pdf
    • https://atl-50.com/files/file/vujofadorutuwewowifopeza.pdf
    • https://acrgroup.nl/userfiles/file/16098476450.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/agncet3a0dsu77jfqm5jftprll/2078153277.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a3c3718675d3c22b20f8314c8eaf7ed0/99455516957.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/difaxegor.pdf
    • http://project-st.ru/userfiles/file/45292711657.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=who+is+rami+malek+dating
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0003cb98.bin
75f41ebde7cc6debd2c8e49d18a5ff7c47c5ed1c31245c3786fcb858dc1b7c8b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CB98 20224 bytes
font_01_sfnt_off0003ed80.bin
c4c05fbfb378d8b196f1305fc07be3efdbb9bca145270ebcfbe8522545cd89f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED80 20104 bytes
font_02_sfnt_off000422ac.bin
34cca444d57d6f0847b9cb9cda50de4e9e2d72b2fedcda36304d4a12eac0221f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x422AC 10780 bytes
font_03_sfnt_off00043b21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43B21 16792 bytes

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