Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07ec15dfc20a734…

MALICIOUS

PDF

97.9 KB Created: 2021-06-28 19:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9446fe51d88b1a7f4009139aac5cd79f SHA-1: 9f6df5077b2801863286bd0a0ef2c1da0d7449d3 SHA-256: d07ec15dfc20a73433fb5d4635ebe0939c820fcf3f8fff8a8373cd3ea38bf9fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mszukam.pl/dat//file/7858598026.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/rugefiwusobigujilokez.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/o7i89bsdsp9j53rbaa88rfdtcp/fefatux.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/cd1388c555c1189bacccee070fa5d2ff/fineru.pdf
    • https://chmelo.hu/sites/default/files/file/58889113097.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/falezanakutoginek.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c99e1845d353a9327e06d2ca197771d5/61558463668.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a58e2bbe0---17694220963.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/00cd1f353b910b7ec0c8009668604b51/muxunojinixerakegodajabi.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/5id6qnrpfc8q5i597ksijs7tg4/vifopi.pdf
    • https://lordoptika.hu/files/files/gadetomuzujilagom.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ed12a6f1e---7455982797.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/aff0a46c7cb7bc53d19b9b96810a92f7/36727624814.pdf
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/51415200498.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/6rjiarn7o9i1021dfchj88inl7/40827426472.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4ad62070e---35795817040.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea2078c12---ratadimowuvewubebabiroxi.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f97af110f---xejetufexepiped.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704c9bbc4f2---36798924245.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q9dqhb48qva9artqgjh42c9nf7/wibezep.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf49a7642b---doxanojogazaxarufi.pdf
    • http://beautifulmoda.com/userfiles/files/rozagafenileditetotefinum.pdf
    • https://autotrans911.com/thread/admin/uploads/file/30854868433.pdf
    • http://aisef.org/uploads/userfiles/file/file/detalaguzereve.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/mja0h516tqgc6h5884kahb8n3e/76336243416.pdf
    • http://re-view.online/fckFiles/file/pitivavuxozipotozub.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=russell+problems+of+philosophy
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 16792 bytes
font_01_sfnt_off000131c5.bin
d970590c3cea66912a50aa3fbbc824e46e68aa19aefd8768c806a0223ef55063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C5 18576 bytes
font_02_sfnt_off0001609b.bin
33bab6807251ce5c9ce544e7211aeacad64a9867056d6aeee8e59b840cb37aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1609B 10660 bytes

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