Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fe0bd36ee51cf6…

MALICIOUS

PDF

136.9 KB Created: 2021-07-14 04:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ff9b9cdfd2016c81ea32e215933424cf SHA-1: 6fab979c4b21db9f39c1111a6eb9f24e37884978 SHA-256: 15fe0bd36ee51cf64e8637fa2aac744ae7adf52e66f33dcf555c28c5315bc552
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, which in turn host other PDF files. This structure suggests a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9354

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 https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/stvlm3fcb41t7acj5brsm5hhgk/zomarawaluki.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/5a36644d9015d481402857fcedbe9a3d/57694415577.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/rikabunivixinavo.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fbff10b5fdc13912489ed5fddd37a887/gezepexig.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/76772621591.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/33792176744.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6317a0b1d3bd3a5e34e2b32d7f53149d/57543415610.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a5cf25e8208---gafomaxepajog.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/cb7i38nhv36vd3j7t04vuijrv0/kupikesozuwotuvol.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/piliwivod.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/sagisalekujogaj.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/9133a4ca769061e643b0eb210a21fc46/68057357538.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/pikajesisoxo.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/misuvevedodamonopibaxurev.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a22035e43ff30759da271531eb1e7cd6/21549935950.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/5a24b6757001f2769f709d5fd7458871/56659718927.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bce46694---17964141871.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c864c54600---89068961471.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33ab30ebc7---felizaze.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2986336b6---xekenanopikij.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16075cea8e25f9---saporibovejirubodiwer.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/niwibeboretufifenis.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/dufizodanefasuke.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/87456031318.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/81437764267.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/84647195958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+free+trap+beats+mp3PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C9E 18100 bytes
SHA-256: 9e01727f48f2bb97f279bb9e76683a6e35477b1171689aecaa2416c58d55990d
font_01_sfnt_off0001ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4F4 10968 bytes
SHA-256: d4ebf20b6834724956c8cb5b192eaafd82eaa5fac5562687a43c31f15181fe62
font_03_sfnt_off0001fe40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE40 16144 bytes
SHA-256: 94ada888842219b54f0bff61c05754c95ee5bc28b4560123b174b2ad5ef12220

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