Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a26a9d6652a5b1…

MALICIOUS

PDF

82.5 KB Created: 2021-07-02 03:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27262b79b6afe5814e735bcb98af8eca SHA-1: ee9bbe28c8dd4461148e2dda73f090d5288b2952 SHA-256: b3a26a9d6652a5b1b8abc40d2d936d025267ae0599820ca79a69524eabe5e4d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised websites, likely serving as a link farm to distribute malicious content or phish for credentials. The document's structure and embedded links suggest an attempt to disguise malicious activity as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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.
  • 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://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac301014536---ladepume.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160739be36c7a2---jivanaf.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0822b7261---fugololij.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/a88a7aa8d16f79fefc4028442dd12163/17523584021.pdf
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210527171018.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4656657bd4---97462579038.pdf
    • https://auto-rujo.com/images-editor/file/fewinemiwawilal.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c006794c3---84920045913.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609432022276f---tefitafujurirerimabuba.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1b6df291f3578cb270de882bb7d0fc5a/73226776036.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160837262c82f9---kosutesetatisasugewukar.pdf
    • http://shinies.ru/img/lib/file/81580323340.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd719281b17---32136674046.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e12e01bf1---degebiwotipupar.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608401b629653---kijifetuw.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18f5f5b734---45372356326.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/fbe36385fa18921d737e62ea2ccb596d/11777726407.pdf
    • http://delvalle68.com/clients/54584/File/34163075944.pdf
    • https://samarpanbharat.org/trila/userfiles/file/ponulekalivikosifavo.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/joug0nak4lvsdf5dcqaf2o23r9/83764610694.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7bee007d101116b501c860a9ce787396/20214815325.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de3ed25e786---sosogesipodani.pdf
    • http://parbatsamajjapan.com/img/files/files/miwepoduvezud.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55b0a4bcf0---4910091793.pdf
    • http://tamker.hu/userfiles/file/juxurubikadenolomejega.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=software+testing+question+bank+with+answers
    • 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_off0000dc59.bin
2de60a6e541adc4ff3b62cf804fa614733d7345843a1771bc5d04acb5a021237		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 17044 bytes
font_01_sfnt_off000108f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 16792 bytes
font_02_sfnt_off00012107.bin
f59837fb65885367b5ee574409b9d54c42d94643d6a2ed3479f567386cdb4c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 11084 bytes

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