Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd81c6792645c0c2…

MALICIOUS

PDF

173.8 KB Created: 2021-03-15 00:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6d631416017aa3a5a52d4c9070515672 SHA-1: 6c0c3a50ce2a599d15e49a07253df0aa8aa0a537 SHA-256: dd81c6792645c0c203c241114893c92fb6272c2294f6e3b07d2daaa539de7f58
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many of which point to disposable hosting and are used in a link farm pattern, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/123?utm_term=lanceur+d%2527+alerte+informatique+d%25C3%25A9finition PDF link annotation
    • http://gekolawidope.iblogger.org/74049184752.pdfIn PDF document text
    • https://cdn.sqhk.co/kidezijewule/MheghVw/16085954305.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/iihcjej/54308849486.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/liresojijar.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/gross_the_science_of_mind_and_behaviourn0bol.pdfIn PDF document text
    • http://bnl-jobs.com/plantronics_voyager_legend_cs_b335_bluetooth-headsetuyl25.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/xonovigemuzuv_jaladixufupapa_fupafenugewi.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/cwrhemX/descargar_shot_soccer_football_legend.pdfIn PDF document text
    • http://visiblawty.com/zunafanorukabilolesubexiwfae7d.pdfIn PDF document text
    • http://com-connexion.xyz/brother_mfc_9970_default_passwordsam74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_a6c6d799bf8f421691e5886eda6dadce.pdf?index=trueIn PDF document text
    • http://dazigeles.rf.gd/andy_android_emulator_without_graphic_card.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_9e53837fc63d4f739c28628ffae6064e.pdf?index=trueIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_7457544442f54c76b9896d98219b2599.pdf?index=trueIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_7054e720ae854f029f9d4f77331c7ed8.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_87f20381bf434c9694b889c850aa0270.pdf?index=trueIn PDF document text
    • http://gupupofof.rf.gd/where_to_watch_vanity_fair.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://scripts.sil.org/OFLIn 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_off000250a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250A8 5232 bytes
SHA-256: e5117b836a740904dfe1ef6959455d481ab2bf51cc48db8e54725587a14312b4
font_01_sfnt_off00026224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26224 16144 bytes
SHA-256: a0986dae686e2e14616f1e39cbfdda941765675f31a1ef772c4a490a0ceca33b
font_02_sfnt_off00029288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29288 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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