Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14a7442cc67d65c…

MALICIOUS

PDF

74.0 KB Created: 2021-09-10 06:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01c4e08575f1c646d83e799d54e7062b SHA-1: 2dbcb01e54c80eef60f8219d7c2adf57074dd79b SHA-256: d14a7442cc67d65cf657b1235a8aeaa2f556a20624b46c60f9fafe1edb7d97d0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to one of the numerous external URLs found, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://around-sicily.net/userfiles/file/57366076765.pdf In PDF document text
    • http://netichikawaya.com/userfiles/file/34844067838.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/kezorumifasavirimaravu.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/23816120218.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210905150426_1091946887.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161351eec2fbca---dadikozamemejowaperu.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/47380097520.pdfIn PDF document text
    • https://bczenekar.hu/files/file/70942013311.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/filozijemegeguvotimofat.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/68863031565.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210905235445.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/govawurezedafu.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/37646117288.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/mikomobunimujodurunuwiso.pdfIn PDF document text
    • https://0900107678.com/upload/file/30591376462.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///falebalikikowetenepazis.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161336625292f4---tolum.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/48454619012.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/10085857983.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/lirulopojogofokudalojoz.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/26477451671.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/sutosawajif.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/76224742904.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/fedobozagalari.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/gitusobiduro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=advantages+of+plastic+containersPDF link annotation
    • 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_off0000c12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12F 10844 bytes
SHA-256: d8037278312a8ffaf26d595cae11f9d30ecc0750ff17bf5939c8d5583a131f57
font_01_sfnt_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 15668 bytes
SHA-256: e9d3f7c69c8d620977818cb9bcf1d7cde646641dea30b2f3c11cc784dd44f82b