Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b2f594375ec17b…

MALICIOUS

PDF

78.5 KB Created: 2021-06-25 18:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1423ff47f6133d17bcd25dbbb6d084c2 SHA-1: 31d3e295e7a1107080ad674528b010cd39f1ecfa SHA-256: 29b2f594375ec17be5fdcc379dbd93e1d25be0c8e6d6f4d01b7c2a25b933672d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a323c85390---moxepuramomeruxilo.pdf In PDF document text
    • https://artenika.pl/fck/file/fazolow.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/dukoz.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/48742081004.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4595827598---morepufonegi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d7566190f---puzar.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/71241457603.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766f8ed08d0---sanaxukajikibexodixurema.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a698b8e249e---23289890302.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/67202167970.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lonmvtiqqp62k63g531fokj86l/xiganefelopugorazoler.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7461ac85adbd25ef9b77ab445fa6d948/13117997664.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/8e49ddb3f311cd85795e14e4e48befa3/sinasokawub.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210618022820_xo3ak5.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6ec3cc61b---lituzime.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/1f66b467f605a9d2c79281758f681c0a/muvunojozivewutunu.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/kezamigerimoriwerativo.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/31058659346.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210523/210523052736844573afbtdu1gfsh9.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/83713703630.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160827408e2c9b---9512344784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=r+kelly+victory+mp4+download+freePDF 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_off0000cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBF 16788 bytes
SHA-256: 17ea237a06f2e387de44ddd1e5e30a5c123af8fe5cf678b4b5646dac780ba084
font_01_sfnt_off0000fadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADD 11092 bytes
SHA-256: 7d7e7d9493b95fe467c7fc97302a289eb6687eb6ecec0001b328440c957d97ed
font_02_sfnt_off000114d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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