Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b07abe59399980…

MALICIOUS

PDF

83.1 KB Created: 2021-09-02 19:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ab2cd7a30f70137c79041efd13963e14 SHA-1: a8ff9b4a49365d3d03c31ea828403e2e70f9b678 SHA-256: 93b07abe5939998038734cb9218f0148cca9e6ed85a052ef47b357ab6475cd84
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to phishing or malware distribution sites. The presence of embedded URLs and the nature of the link farm suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://inwebjor.ru/uplcv?utm_term=prescott%27s+microbiology+8th+edition+free+pdf+download PDF link annotation
    • http://alibabashipping.com/userfiles/file/bitegamowena.pdfIn PDF document text
    • http://parisplaza.net/clients/3/35/3561a7ce45da2f2f114a98ea6175a4b1/File/33704898222.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ceddcaafedb6d03a752ef6ed793ba69a/gulujaxuzejefege.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/702fbb3070d6b72ae3b1bdcdf2860614/nikukowutogesanitelewajaf.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/34862258982.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e9974dde7b87a22c556231df6f996904/kezevewasinesilunizuve.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/40397971540.pdfIn PDF document text
    • https://memoservicesrl.it/file/jafelanojiril.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b986ea9b3357c5a9905fb8f02050cd46/20853016761.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f1938361f712c15704d9f4119dcb7456/dedarulujuzaluwo.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fc34ac463---vukifagupalukobinuxasini.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2c563a4f8133dc4983f6b3f011f0b607/xijelaguvigedezabok.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/vebawukatakoduwaziso.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/meradinupebafoson.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/poxeve.pdfIn PDF document text
    • https://777mto.info/contents//files/98127691009.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/juwiduwigulalefopoti.pdfIn PDF document text
    • https://areicon.com/images/file/14076331504.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab53d59b5---regokatoxajekegegusi.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b97a772e66700ef3e21af1585f5eb0ce/17116434482.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca3c607dbb---13587948811.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/38738767857.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210819051322.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/55552474614.pdfIn PDF document text
    • http://ddgasul.com/userfiles/file/medowizepena.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/pifejabope.pdfIn PDF document text
    • 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_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 17524 bytes
SHA-256: eb7e102625dc64222fcc2ed24570a311e930761d043442522c921e60370947b1
font_01_sfnt_off00010a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A29 11652 bytes
SHA-256: 89ffaa541ebeb41e211ff9d4f170fc21257712e113bd38b21f2aae0e256fc8ce
font_02_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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