Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f972e8ea5e861d9…

MALICIOUS

PDF

79.4 KB Created: 2021-09-20 04:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f976f6d81ae73eb3b3d0912113ac259 SHA-1: bce05168d6b7a7496be3e899c76fd5c5f6bf6b11 SHA-256: 7f972e8ea5e861d906abe1cb7ddfd35608e07a454509fa097d41d15c5d94fc60
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=how+to+change+android+phone+ip+address PDF link annotation
    • http://shipagents.nl/uploadfiles/file/ruwupisitoworowulipew.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/95191795400.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/wefunipokeruzu.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/suvibameroxapevilufoki.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/16694884605.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109170850166960.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/67598690249.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/90590976683.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/jaxatovuxukuf.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/suxunijumufe.pdfIn PDF document text
    • https://orrizon.ru/images/file/vekerigopexu.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/beleje.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/36706704015.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/82102851298.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/01/file/20210901_050849_125.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/xusasetegosamisejidamuz.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/dusas.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/83671862606.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1d1ce582ac398209c1a21bd597d8eec9/kanitomoxasogotabisiba.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/96622603930.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/12062167919.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/giwofinilizafopaxax.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_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 10824 bytes
SHA-256: 546094b8c60579e4f6eecfe21a2e7ed69a1baeee5b8994de763d1a3ba4c5d412
font_02_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 17672 bytes
SHA-256: 1dd6b316ae7d7f2e9120b961ff25c3325dba670938fe75ba5c6733682124872e

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