Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4647d86d76d270…

MALICIOUS

PDF

69.6 KB Created: 2021-09-30 15:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 51a0280da40f4fae7642b5cdbfe0a493 SHA-1: 6b4dd530c0498f77696c2a29b40dfc9554c40180 SHA-256: 1c4647d86d76d270014c3c9698850a0d85100ee89bff3c9b222b65e8eb83a822
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common phishing lure, presenting itself as an image to conceal clickable links. The embedded JavaScript and numerous external URIs, including one pointing to 'garglob.ru', suggest an attempt to redirect the user to a malicious site for credential harvesting or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=need+for+speed+most+wanted+download+for+android PDF link annotation
    • https://maurinet.com/userfiles/file/73541826079.pdfIn PDF document text
    • http://caythuocnam.org/images/files/vowuzefawesipuzaguta.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210906210732.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/84988801105.pdfIn PDF document text
    • https://ienter.bg/files/20951667251.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/bogisatomegib.pdfIn PDF document text
    • http://jaqalsports.com/files/file/betatanotidekumekexijaza.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/82999173361.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614f7d6b3e09f---82466552592.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/13954876437.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/milafobimujuro.pdfIn PDF document text
    • https://istanajp.com/contents/files/41682456386.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/8899296881.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/keren.pdfIn PDF document text
    • http://temple.mo/userfiles/file/55301333490.pdfIn PDF document text
    • http://happy-land.hu/editor_up/42375406458.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/dazepukovepagatujebavozo.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/031823377028.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s9nfkdoe1qaqbpktra7b5cobu0/nasogebunewozerawamarifi.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/fowarerin.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210925172332.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/monimomutuxafonifigew.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/37824400391.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-6/20210906192649203508.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/zafidukowajemakiga.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/24297116430.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_off0000b40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB40D 14312 bytes
SHA-256: 27581d125a1764d3205b6e511e5fa3ed182a03ec3d1c91a780bee7ea157fb507
font_01_sfnt_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 10720 bytes
SHA-256: 6951d12dd72a17e3658b542da89012256e71fcec9e2be025890abb70deeaafb4