Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cebb37212348d4d…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 02:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4346421c1ffc323071cec9346c4c4a7f SHA-1: 52b94a1124899a438211e762dcf9a237fcb34223 SHA-256: 8cebb37212348d4df09aa2598455954253bfcfee8d68f1dcc2ec4c71eff954b9
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://world-green-hope.com/uploads/files/33915963922.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210527211046.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782fdaeee6b---nirowagejaruzud.pdf
    • http://cableesmaltado.com/d/files/bugofowipoxo.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608714f31de38---majulerodijis.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/63d0bec3f54d50b09fd6e4147da245fa/guduzisozudi.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b5477c3cf---7772264803.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/hodu3sqrcjo6tp69cuofjlvui7/9276842532.pdf
    • http://pphu-joanna.pl/fckpliki/file/bavijufamad.pdf
    • http://rollfactorytogo.com/uploads/files/fibojivanotamuvir.pdf
    • http://bpabv.nl/uploadfiles/file/siwemesupex.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a044c083e8b---pemomobunevasomibukofogi.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/4cedf0ba14022f45803cfb17c35a9c13/kobelubojitenoxumelu.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0bef6156442e317fa2fa5b54abe04ec4/pasimuzosojoduzevitaxusi.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44685bdd54---55224345511.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609152ac257d8---gazegorex.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/l93gi2big3hc9t4bq3dvl417pt/60594631824.pdf
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/76509773036.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160afa77b7e478---tivinumabunifikeluwowud.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/fhovdmvdr1ucqbrt4fd0dkiap4/67466919080.pdf
    • http://kibbkw.com/uploads/files/zikes.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+golden+chain+of+homer+pdf
    • 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
font_00_sfnt_off0000e76f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 16792 bytes
font_01_sfnt_off0000ff86.bin
3086d13472f736b05dd3f4ec9ded9d4c7434381bd3f6aa98e1886af9ef1db62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10764 bytes
font_02_sfnt_off000117c8.bin
1c3d2459187b80c09ce46ab73cebaa8a8b990b8f8a376b4d1d65548cc15cc552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C8 16416 bytes
font_03_sfnt_off00012e8b.bin
fb1deaba5c25718793961ab00777f0afe0c26d091631961f82b0043cfa419607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8B 18032 bytes

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