Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6a849520845466…

MALICIOUS

PDF

125.3 KB Created: 2021-06-23 02:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0d82ae6c5166cfab0556a7c7c0428c8b SHA-1: 9cd6016d698b03b9776cf70ac2605a206ad81b0a SHA-256: 9d6a84952084546689d5e41bcad3edab8f19c728de1e106cd9d1eab406c4bc60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress uploads and utilize link farms on disposable hosting, suggesting an attempt to obscure the final destination. The presence of these link farms and the overall structure indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609145b481f23---poruzomugozukadinu.pdf In PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/55242349262.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160786658777bc---70635019304.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d618fc78899045fe8871e07853518c17/xafiximekeninajikarubu.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086c8952905c---goxenegafalewavezenugili.pdfIn PDF document text
    • http://roocenter.ru/upload/file/53932932869.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd3db0f584---74845812303.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/mifol.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/60a5205062390a1ee8a8fbac8b8b3e65/23368472669.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/3911864644.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/xomower.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a87049f3b56---80221192320.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/dakivibenafokovufufakugit.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607070b712ce1---6964130242.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160852f63b995d---fogedefojemidemon.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/50282916454.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/84011381952.pdfIn PDF document text
    • http://drironcat.com/images/file/vatovovivekozob.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/0d0a05d20a8ff1507c8c7fa61d62cfd1/36257631882.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=kambi+chechi+malayalam+pdfPDF 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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000160c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x160C6 39952 bytes
SHA-256: 48aa67f86df7f8afb97cab4729a03813107f929e1732d5ea87b54a50c5c485e8
font_00_sfnt_off00014ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBF 5332 bytes
SHA-256: 75255820c34d38d16d03720457c85d825291864d11e6d46f1ae944cc6de1f193
font_02_sfnt_off0001c6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6F2 9664 bytes
SHA-256: d9e769fd6d85ee85f40a1b5230a4017e7a0098d4e8086fed583e774607ed9845

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