Malicious PDF — malware analysis report

Static analysis result for SHA-256 907912ffaf8678d0…

MALICIOUS

PDF

89.7 KB Created: 2021-09-24 00:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4e610a12817ab35d7716250a69b05f62 SHA-1: 170812b42bad3080f5c91ea500efce553f5abafb SHA-256: 907912ffaf8678d0ae489c0b949f72b6c3951c06fd7c3ba316bd7c453f39661b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and a large number of external URIs, many of which are part of a link farm on disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for phishing or to download further malware.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=magnus+chase+9+from+the+nine+worlds+pdf PDF link annotation
    • http://geobigoni.it/userfiles/files/dutogetokeritexagupafeso.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/55655114490.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/71796638713.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/69811993808.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/30069179174.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/nutonojubejorudere.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/20441245927.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/bejeji.pdfIn PDF document text
    • http://fteq.ru/files/file/74889784203.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/xejukakiwixukovaret.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7c9662dd3---kojulofaguboxatefafuzu.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/13d305d92730cd6acf722b6e5b68b838/levunuwesolugowukofugo.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/jipetotuduso.pdfIn PDF document text
    • https://attack.lt/images/files/51585500571.pdfIn PDF document text
    • https://izometal.net/mm/file/fedijofuzegujawaduli.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210924050248.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/22868512717.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/topulatalalu.pdfIn PDF document text
    • http://fygl.net/uploads/file/181522063902.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/73067373795.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/fefiwatax.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/negose.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/tevanugut.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/60971316288.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_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 11416 bytes
SHA-256: 3880568c8de53cd151015c7b1d35207a9e3ca66a5ade2a8874ef02476b9a4057
font_01_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 19416 bytes
SHA-256: a9340371cbd78df74c82606a12823d210c0674a0fb85cb59822772af696c255c
font_02_sfnt_off0001409e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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