Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302250419a084f7…

MALICIOUS

PDF

99.1 KB Created: 2021-07-18 22:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e7dfec3a17df0adc78bc6a5db93cfcc SHA-1: d5191426398dcef4632310599020de91410edcef SHA-256: 9302250419a084f725c6d8a727f7a84ac67255589caf650cef094cd3b975a4e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/taf4gkgcl1ricmm4evu33830q6/pigajirufifejuvolevexen.pdf In PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd67878580---74228100739.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/6ovbcn4303i6hlaahc3jdq7l5e/20932492097.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/43152210224.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607188a7cfe66---zelezaxupulobanumixome.pdfIn PDF document text
    • http://calisnt.com/uploads/files/dujavopobozojetabozo.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/ruvadubogosif.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c70a786bf33af790ec78d0678a13fc34/dadadif.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e1c5a2f9d---40926453771.pdfIn PDF document text
    • http://hoctienganh123.net/upload/files/3465607640.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/10140658837.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160866c61341b5---jikenodamexitigabixevamu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08e3e99df5---jonimelajexapufomejuje.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/voxavefi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8960811b9fde1b0d1afa76463be395f9/wadosoro.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/19490390069.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1475864504f48f11cd6303f2393f090/64956208017.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160945066d861d---49253258890.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/95977647505.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160864b8220746---19605495471.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/23487117825.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/umobth1h1cb097r9g1hvvjlacu/56882336632.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/14941870428.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/tiruridatebi.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f73dc668e88f9bb96d24ed46e4d42e7f/putanurexumenot.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef10081f5---83952077119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=introduction+to+post+tonal+theory+straus+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
    • 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_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 17956 bytes
SHA-256: a29d2d7653511460d49d0d1c3565dc2a59df396a789173e6062840a97d5cfcb9
font_01_sfnt_off00013fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C3 10880 bytes
SHA-256: 041f2485b6e274f10bbc0202ffa1f2e97cb240a63bbe872585046d858ea5ce68
font_03_sfnt_off000170da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DA 3448 bytes
SHA-256: 7ed5fff79d5391e8c3112c73c2d4efc80eb786d023aaf197280ea7f7ea1afeed

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