Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d24fc84ead67ab2…

MALICIOUS

PDF

92.3 KB Created: 2021-10-04 14:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a8d9a15bc33d2eae8fe5addd47e11126 SHA-1: fdcdfeb27d0814e5b2998bc1d73c6f3308807de5 SHA-256: 9d24fc84ead67ab2734db9f3405e7eba1e82b4eb3aefbe3b3380f0e513c22c31
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, the document exhibits characteristics of a link farm with a high number of external URIs pointing to various domains, many of which are unknown. This suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tunguoilon.tunhua.vn/ipp/images/uploads/files/ranokitijigurot.pdf In PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/witixelizofawuwi.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/tisugu.pdfIn PDF document text
    • https://cityface.cz/res/file/simuzidibuzilemixebo.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/lideruti.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/zesatepeporuwirad.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/91156152160.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/onb340v0gbetlef243qirqcu56/pexumulu.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/96376547576.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405b47599f6---muxagijavopekani.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/sifurovegewusemuguje.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/96878643571.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/52868028553.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/94224873504.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/xevugutiribixoviwerizofek.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/52127362598.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/8511441149.pdfIn PDF document text
    • http://mobiliteit.nu/files/18550260581.pdfIn PDF document text
    • http://freeski.hu/freeski/file/58950087264.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/nuravopokijexojokot.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/96108985398.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/duwisuwigub.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/tedefivagokitifaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+long+does+toll+house+cookie+dough+last+in+fridgePDF 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_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 11024 bytes
SHA-256: dc267c9472ab84d1e5dc1068cc4f78130849d8614f48b9cb9cd62bdab67a89c5
font_01_sfnt_off000113ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 21344 bytes
SHA-256: 543dcc9659fe31ddaf0c0835a049d7dc575af3aaa923686d5f4875bd0b72c9cb
font_02_sfnt_off00014b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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