Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c3e02befd7a8a5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 01:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 88d0dd131691fe6ab44d5b036f4dca76 SHA-1: 31bdc46cea89706322ff81af9bda8c1b20c6399a SHA-256: 47c3e02befd7a8a5f6c765e634760f94b19acc894a9d39fcc2b0be5cb70bf705
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The presence of a 'download button' lure and numerous embedded URLs, many pointing to PDF files, suggests a phishing or scam attempt to trick users into downloading further malicious content. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • 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 https://cupanghitam.com/contents/files/64569914154.pdf In PDF document text
    • http://indcms.testingmachines.com/images/file/zejiwefemujagiku.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/vozapeleragur.pdfIn PDF document text
    • https://adikkedua.com/contents/files/lotobixafid.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/gefetalud.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/mopanoforivugosiza.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16133f8e164a09---17608668662.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/88055447618.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/26287153732.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/42491596479.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/bixowanatasovesikavexev.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/rofovumudomezib.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/50095207459.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/tavibe.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/67505755175.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/xutofetopax.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/43531698561.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/puwilumuvijesofa.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/10666152517.pdfIn PDF document text
    • http://dhf-china.com/d/files/vefosavogi.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021090419442173499.pdfIn PDF document text
    • http://sinoorchids.com/image/file/50740763451.pdfIn PDF document text
    • http://kaies.cn/upfiles/210905225549782741pykxnt.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/917241049.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/76625550529.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/23010664869.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/bezosifom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=assassin%27s+creed+arno+chronicles+apk+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_off0000d9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 10708 bytes
SHA-256: bfb54b81bd03a6effaac28e0235bada2b15c6d6fa5593a055366289c5bfb4b8e
font_02_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 18128 bytes
SHA-256: 13b17a2957ebbf23a698d58c13809a181076de79e56803c512372c4f72add0c7