Malicious PDF — malware analysis report

Static analysis result for SHA-256 74412586a3a90f28…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 12:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7096a96b6314bdfaf618f1216b81326a SHA-1: 30a90fa35bc264fd541e7bc3a76cd14060c82557 SHA-256: 74412586a3a90f28cf772fcb29c2dae78b5cfd05b7c43390d33795923ad074a0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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
  • 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://pistant.ru/uplcv?utm_term=robux+hack+codes PDF link annotation
    • http://travel-door.com/userfiles/file/24721995786.pdfIn PDF document text
    • http://taociren.com/upload/file/210917023246186171haa9ot6wn0ec.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142eb18cc61b---kukozevojerideneler.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/luvidoxuvanudebijuku.pdfIn PDF document text
    • http://lgassociates.in/uploads/33638674941.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/73150738335.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/58279507801.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/63049151265.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/dijotumetudarag.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/82974840745.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/99948130874.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/visuxatidowik.pdfIn PDF document text
    • http://sparkpro.lv/content/file/58799323823.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/51704756638.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/dokiv.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/58140829868.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109011034208208.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/9308530905.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/3702519239.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/zafeka.pdfIn PDF document text
    • http://jcpingie.be/public/files/96368046054.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/fotunuf.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/52432351558.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a490748c9---laxazixeripemito.pdfIn PDF document text
    • https://cinemaparadiso.site/uploads/files/1976433180.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/81339546187.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_off0000ddb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 18920 bytes
SHA-256: 76c034e91c09d67518ff0fff0819d86d136e7d187c7167cd070566eaaf8e003f
font_01_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 10508 bytes
SHA-256: 86e5b956c6e360e46a40e96c7ce30cc596eff746801e12283c714e166993a124
font_02_sfnt_off00012719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12719 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1