Malicious PDF — malware analysis report

Static analysis result for SHA-256 74328b8f44c98100…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 20:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55b297883313e67f586cb4ef4cbc3899 SHA-1: c3c04f910cbd4680abefa7280bfd1aee3746939d SHA-256: 74328b8f44c98100d06eab6167bc6bfa069bddac218dfa8f50696aace7a00ca1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured to appear as link farms, a common lure for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a deliberate attempt to create a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://anitacalderon.com/ckfinder/userfiles/files/tabododexuninagaje.pdf In PDF document text
    • http://www.findvoters.com/userfiles/file/gufijemetobudifel.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/gukir.pdfIn PDF document text
    • http://hijoin.hu/editor_up/nurafuwapuduvo.pdfIn PDF document text
    • http://jiab.net/userData/board/file/xotitujajisolan.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/64043309787.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161301a2e15183---bakavafer.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62817205189.pdfIn PDF document text
    • http://amatnieks.lv/pictures/image/besubem.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/55586382473.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/89a5ef4b984ce12c7a111971dac9b3a8/26920590603.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/dumibuzotafuduvukejo.pdfIn PDF document text
    • http://rs-entp.com/upload/file/18776664683.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/morilo.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/93129509636.pdfIn PDF document text
    • http://identik.hu/editor_up/50226341203.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/53399798620.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/88433308492.pdfIn PDF document text
    • https://bachson.net/upload/file/32082952186.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/xelixodulofodakuvav.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/88215440811.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/2373391064.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/samekijubazoderimela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=principles+of+design+contrast+definitionPDF 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_off0000dd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 10796 bytes
SHA-256: 125cf7805ff5996aa05cbe99c87778fb12ac56086a4d43ba01c8d9b75e43d78e
font_02_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 17996 bytes
SHA-256: 26d8bcae005f793145f2e810d93e83a868a68c1eca749139add56a9f9b0f7dd8

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