Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e566bd7209f1388…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 08:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de53a8894cd4d4fb1f21966a09d9fd82 SHA-1: 59180aa2cd7c46374cadc976330a5c52bc02377e SHA-256: 2e566bd7209f138894792a805491988ce870e2d119ff00703cc1fa3a1e989d6e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many of which point to other PDF files, indicating a link farm designed to host malicious content. The presence of a 'download button' heuristic further supports the phishing and malware delivery intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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.
  • 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 http://fasson.vip/images/editor/files/94977474334.pdf In PDF document text
    • https://tortugafilms.ca/adminfiles/file/pepovibuzesusiweradif.pdfIn PDF document text
    • http://coachhouse.info/assets/file/95907822975.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/5221524156.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/40053926299.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/tuninuridofadikaponuso.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/bagabutisozesaduki.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2affceea9---mijozinulorovikotav.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/videsiv.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/1002374510.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/jepabelini.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/30776615355.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/7563785176.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/newapu.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/17728401401.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/tikategezuzilogilaweluw.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/gogekevufovawikujim.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/17450169881.pdfIn PDF document text
    • http://aven.su/userfiles/file/bogifilazoge.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210902_E80271E4BF883039.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/lowozebukisidoje.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/61872237019.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/86476056173.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/93593617615.pdfIn PDF document text
    • http://master-vin.ru/files/file/88902131074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=hill+climb+game+hack+downloadPDF 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_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 17736 bytes
SHA-256: 20c64b1353932811736dca30087612e805d42eebe4f7c3145f05f002d0884dd0
font_01_sfnt_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 10760 bytes
SHA-256: 2eb858f54820f23b53cd82b5ed2b56862d571cb014d6b87fed760f1db0666411