Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4e006795d2f2e5…

MALICIOUS

PDF

84.0 KB Created: 2021-09-16 05:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 899fb7c1eaa0ad698ef89b5eece3044b SHA-1: f1aa8ab7883da85030d6253782db270f18f8657e SHA-256: 9f4e006795d2f2e578560141f22d0d5a4845fcb2a7e7de0394862f39ce7a6289
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=how+to+install+kodi+on+phone PDF link annotation
    • http://www.advokat.com/app/webroot/img/fck/file/tazowaratosimapekaxagozu.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/mowob.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/musisidaferetizadid.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/mofebibuzofaxunebu.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/romiguwalaramiwixikenuv.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/84503801694.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/mopepeniwadezijusabovo.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/fokekonuparuxu.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/d81ba04eb11cdea3799800bbeda04ca4/61190424531.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/jekisilelanurujevo.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/79192194648.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/63916365228.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/ropajekumoxu.pdfIn PDF document text
    • http://silver1979.com/upload/file/rilufogadanixisejaguvoj.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/42157061141.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161429e1b8f48e---fevapibifogimiforuf.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090523493885.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/29328873904.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/wagapufola.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388f66c7511---matalutemikikuw.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/81730713437.pdfIn PDF document text
    • http://recrute.fr/files/files/falujujij.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/85614219049.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/sumupivusomusawiga.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://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_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 18496 bytes
SHA-256: 8c9a5a7e0cca44e48efbfd18b38d8f316145509eba006a26893083271b2b8361
font_01_sfnt_off000113ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AC 10560 bytes
SHA-256: 0db1596cfe3e2d07b7d53fc95880ee0ab956f2156558c097f4588f4fb654f2ff
font_02_sfnt_off00012bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1