Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b2dcac145cfa0a…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 07:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5570bf956ffaa87c281a9e4a17cbe1ea SHA-1: fae4eddfe183f3304406689f42bfe650fb830e4e SHA-256: d4b2dcac145cfa0a2c7ade375e537d3a4b702aa6cca1fb1f5d41228e4458cb0e
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF document was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded URLs, with one specifically pointing to a page designed to harvest credentials related to finding a Gmail password on Android. The presence of 'SE_PASSWORD_ARCHIVE_LURE' and 'SE_MFA_LURE' heuristics strongly suggests a phishing attempt, likely directing users to a fake login or MFA confirmation page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=how+to+find+gmail+password+on+android PDF link annotation
    • http://orkoien.com/userfiles/files/lovotatuda.pdfIn PDF document text
    • http://esipro.be/userfiles/file/vekorukapiso.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/rorevexunimijevik.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/miwogulewivesis.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/14403755534.pdfIn PDF document text
    • http://huntland.hu/upload/file/filumorekegafaxoxuwiwosa.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109021412079616.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/lukobojexuginurotadogolap.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/zeguzugeregaxopevovir.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/domekipifawudufajatona.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/48599008991.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/77728442229.pdfIn PDF document text
    • http://metallpress.ru/files/samababojidowesujolimole.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/84339088857.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/kijuse.pdfIn PDF document text
    • http://praguetransfer.com/files/file/1156222278.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400429e220e---futinupejokeli.pdfIn PDF document text
    • https://toocapen.com/files/xulipiwelujofefogujaxul.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/rekijowokizalavod.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/467684409.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/561349349.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/dasizosulugulonij.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/94463355645.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/sozutifuvexa.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_off0000d2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 17696 bytes
SHA-256: 0111076d139a76907e7cd3fd23050ae2e084455ba72e2c29bb79b4e1bbceca84
font_01_sfnt_off00010087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001189e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189E 10784 bytes
SHA-256: f94fb2c9967c2add8dec5b7af9d5dd1bd774aad2260cb526dd485b50c9872bde