Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5686f496ac5fe18…

MALICIOUS

PDF

91.5 KB Created: 2021-09-09 00:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 326d8debf514af97ff9c60b9c1067743 SHA-1: ca9af0120e5bdcbea67c70f90ff9424134a90797 SHA-256: e5686f496ac5fe18c370159accbd6103c2bfc9ad85fd1315d9f6b8f7e087e9a8
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

The PDF document exhibits multiple high-risk heuristics indicating a phishing attempt. It impersonates Amazon and uses a call-to-action lure, directing users to a link that does not match the brand. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=instalar+android+en+playbook+blackberry.
  • 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 http://paradisetourkorea.com/FileData/ckfinder/files/20210905_6A85AC12DDD446FA.pdf In PDF document text
    • http://georgewongdesign.com/gwd/upload/files/59045038691.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/30853238504.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/wuvuxivikamo.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/74307011823.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/62840344521.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/kililux.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/99696276144.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/wuwuzoke.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/koxibosivekopoked.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613405b182c20---temajepobakowefaf.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/vopokasiliwetewupol.pdfIn PDF document text
    • http://epmachine.ru/d/files/76700572883.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/vaxejejexidutoramatuwupul.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/79122567482.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/14808951641.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/53682887548.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/jepuv.pdfIn PDF document text
    • http://synphabase.ch/upload/file/julakitowel.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4491199026.pdfIn PDF document text
    • https://buka.ru/sadm_files/90337160474.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/jekijasexikitijinogabeja.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/90008848295.pdfIn PDF document text
    • http://stonebreaker.at/gewar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=instalar+android+en+playbook+blackberryPDF 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_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10804 bytes
SHA-256: 266f49d91d98287a981a20d9e4ea5dfbbab02848009caa325850eefffdc3d50d
font_01_sfnt_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 19036 bytes
SHA-256: 1d5a6069b6bdc15d7dfc941724f6c0e06b392a3992c7f44b4d40d5d65189c16d
font_02_sfnt_off00014836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.