Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f0f9545376d0c8…

MALICIOUS

PDF

157.8 KB Created: 2021-09-07 03:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 42f9f36d4e4ec97250b127aa448766de SHA-1: 6a08720d8eea00a1d6bfb4d26bd88a8784d62db1 SHA-256: 74f0f9545376d0c8dfa6b12ab4ba6382cdfc5bf7407e578ae23aa63c3641eaaa
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://kemmurad.com/webroot/img/files/94201897462.pdf In PDF document text
    • http://shop-cartuning.pl/userfiles/file/zopejorubofarexapobu.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jmfvpp543nmg9opo7rg5s5u1kd/79898793234.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/netakoxawabagup.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/846d0729c310ed051a66e6fa2823265f/guvopowovuxabiretizozevij.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611287b92ec6d---51573196457.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/64ujjq4pqjblr7e5nd4ob9gqv1/32831404819.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e027f26b3659fca25b69bd59233acbcb/6698433173.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/80043577692.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b811d8945c1---fivapedizizikefanigod.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b85ea66eccf2aac37fd98994e4f09e25/22228023219.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2bf08ef92d91c6e4eea58f44a53fe418/dekerivomulinurava.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/nuxudufabuvakejijadigimul.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613066a961a15---jesila.pdfIn PDF document text
    • http://ibb-online.ru/f/file/podenopibaleni.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/bc5f7eb296395c45058889a2ba20b7b7/zagujofosaluzika.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/qj583p98fea9g2makipmg8jkaf/giresusepu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780bb17ce26---vupigawiluputepexunefode.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b6021eeacd5---80395175993.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607758bdf223b---nanekoxabosusunaxewoxiti.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/16981468351.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3572574198.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/gikudalunujamafokuf.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/16068111920.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/xebarozowonatudor.pdfIn PDF document text
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/81063178579.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=sentence+transformation+exercises+with+answers+pdf+petPDF 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_off000203f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203F2 11100 bytes
SHA-256: c82899c8bfa27dfdd4262b5c2e2a11dba7510737de1215273e434f4fe07f0859
font_01_sfnt_off00021db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DB7 19588 bytes
SHA-256: 9fd64316f1e099582e8173a1b48532af9f27f24a3ad247c01d46e567290b929f
font_02_sfnt_off00025030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1