Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c31568c7cabff2…

MALICIOUS

PDF

72.7 KB Created: 2021-09-17 13:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f9d87b9d6bc1aa9df91937f72b93a5c9 SHA-1: e469d0148c33bf5b4e5a4931e29acb5ef32d5c1a SHA-256: 60c31568c7cabff269ca24b8b842f82ad10f2a126272094066aa79426d3ad43a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to obscure the final malicious destination. The presence of external URIs and the overall structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=when+is+season+five+of+mha+coming+out PDF link annotation
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6fa65adc4950d0843f518a645a92bee0/mejalegijorujilu.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/zaremabesiruluvoji.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/rigulavewunanefolafipepur.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/gijur.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/94013406590.pdfIn PDF document text
    • http://mlead.net/images/e/file/99732574986.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/mubezavi.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/41402904748.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/toliwiw.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/29208690642.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/26683531974.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/dazazamolutiriwilexezejo.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/38587250589.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1631256327.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/e1jjgnr00urhgafapcq2cmjgrs/51697818434.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/notivakomuzunibejof.pdfIn PDF document text
    • http://vititanon.com/user_img/files/kukidujozekibadameniv.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/sivusifomuzuv.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/getizejuj.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/vibosoxizisodalafu.pdfIn PDF document text
    • https://aashianarealty.com/file/nuwaketa.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/nedoxugata.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/34442606002.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/wovepefazopogu.pdfIn PDF document text
    • http://hbaoge.com/upload/files/28575110786.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_off0000bad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD1 15980 bytes
SHA-256: 1cd49d2a89ae4fdbdd34ecab98364c1db69f8082fb73ad586af06ec2155ca03e
font_01_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 10796 bytes
SHA-256: 3123ff6f4a65dfbf411dfb626248236114622e813b6602555cae41e41deadc85
font_02_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1