Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06f140e06bdbde8…

MALICIOUS

PDF

117.6 KB Created: 2021-09-16 17:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9100013fdc0c753f19c0018a152ba316 SHA-1: 81d999e60b5427f5dc373181dd56247a0e50e4d5 SHA-256: e06f140e06bdbde8c725b687a659d268585911f09da9c241d64181c7d409c80e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, suggesting an attempt to redirect users to malicious sites. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=redmi+note+8+pro+12.5+update+india PDF link annotation
    • http://nhatrangpalace.net/app/webroot/upload/files/12222089764.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/gudopu.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141d44ce3381---zofoviximibudalurogim.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/15943561797.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/67097421442.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/51946610168.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/03aedfd750389f17ba7d095483bddd8d/fapomuxewonujuwuzok.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/dovomovepurijivodize.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/zukoruberigemefo.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/95818646764.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/melatebazumepajemuvezinu.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/42517533081.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/lerixufuxunugilekamifisev.pdfIn PDF document text
    • http://slovoveri.org/userfiles/93698086013.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210902164652.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/duzevuz.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/tozazuxizu.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/66207935707.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/luwexomutaxefawopi.pdfIn PDF document text
    • http://jsdarvin.com/files/88455645277.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/4289499605.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/1022635657.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_off00016777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F89 18088 bytes
SHA-256: acefe552dce3762e6f4ce97365d167cf66b554dd750e65bf577a4b4bbf53871b
font_02_sfnt_off0001aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEEE 11064 bytes
SHA-256: d41d709209cddd58194cd5aef3e62c587b6d130a23674f15596fbdb04a21c812

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