Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afcf122faaea688…

MALICIOUS

PDF

67.7 KB Created: 2021-09-12 09:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: b2ce522d580e66e09c8ac0b42f51fc95 SHA-1: a4805fbba1ee481380c695b5f66bf34bd5f89def SHA-256: 9afcf122faaea688c465a4fb2a3d09c1611ec847120673e682a31c160e741bd3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://pistant.ru/uplcv?utm_term=roblox+da+hood+mod+menu PDF link annotation
    • http://sccsfz.org/upload/2021-09/bewug.pdfIn PDF document text
    • http://glassick.com/userfiles/file/lesetob.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/zonedajurisozisixevuz.pdfIn PDF document text
    • https://casaalu.com/luutru/files/fenuwitadakugiganiniwa.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/86839152642.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/41633775769.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/49302979858.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/kavalirunipugokemituseb.pdfIn PDF document text
    • https://network-italia.com/file/sefalubowexizavuseno.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/399e81bb03f9514438fd157d1883758b.pdfIn PDF document text
    • https://southafricapools.com/contents/files/96932855244.pdfIn PDF document text
    • https://majubesar.net/contents/files/mujawubalevabobusujijis.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/66881205941.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/79836931998.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021090704521738.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/49258252231.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/wazikobuzijufiwafemuza.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/ec7ee9b1ef2029486ec768dfaef1fe94/25269561761.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/70597317370.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613c726bb608c---fivokimapamevote.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/menugawimesezola.pdfIn PDF document text
    • http://precisao.net/files/files/5014916731.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_off0000addc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDC 10444 bytes
SHA-256: e913e40c0583cdc0554988695ab21f4176488c7ec8a9f92884ff5f78218e4818
font_01_sfnt_off0000c55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 14472 bytes
SHA-256: 9585380407d8693aca8f481211e8cd6efa6d3f7850b83cb182c3a5a0b0d88af9

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