Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e3fe2cc67adfa9…

MALICIOUS

PDF

87.3 KB Created: 2021-08-10 06:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 72286094660397b43c098acc227bcbb0 SHA-1: 98988cd70c7db0915a3d534395b661d20eaca6f0 SHA-256: c0e3fe2cc67adfa9f177d074c3b56447456503b6f1ae474d230bcff01b1775eb
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting, likely to distribute further malicious content or phish users. The presence of multiple links on potentially compromised sites suggests an attempt to obscure the true origin of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2091bded0---kemexonewepesiva.pdf In PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/75559121980.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/dejapilojixuzim.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/34b0f3e40546f036d780dd410fe9d6b3/49687840221.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/zubane.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f68a805667---wijupoxakewujumukuwuz.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/35392999566.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/womifaru.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/tuvejefosuxevotit.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3ae9b9b1a8bc7ea16a2aaaf77c322684/8019155197.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/ed3fb45aea57df1b0faf28bda993f644/6071120822.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/rokalegesoxevezukalat.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/45207528670.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/tijanuropupagozuzo.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/jowemokuv.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608993b0790ed---80108033883.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe75a6b188---latilupa.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/51068460352.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3da377707---fajafaxafejud.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a57fa83cd6d---vosuzixusuzadekiditezopu.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b88da6df68e---fanabasimalipawob.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/zefojumib.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/kuvovaxi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7ee4ddf3---somilugegapejatanativezaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+blender+for+beginners+2020PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 16836 bytes
SHA-256: af42ee5feb239377f0f8bd3c2c3899c31075e993d0033f05908420ce9b22d9cb
font_01_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001340b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 10924 bytes
SHA-256: 627bfe848e1b9009957f47342405b0eaf211904df1ea64f69a98f2954c65dba5

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