Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f77b5ba6063da8…

MALICIOUS

PDF

85.0 KB Created: 2021-03-13 15:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 05b8459a1d89bfc6035e59178d8ad3d9 SHA-1: 84eaadbbc859e4e7622ca3ea76b8daa595484715 SHA-256: 07f77b5ba6063da82031d0d4a8bdd87a949d5785a09b062db8d43cf84f267eb0
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://nipisod.ru/award?keyword=java+8+new+features+durgasoft+pdf PDF link annotation
    • http://varerafuvurine.22web.org/49082671137.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/85205035360.pdfIn PDF document text
    • http://alisabor.design/bigonumiqd0wh.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/what_does_survival_of_the_fittest_really_mean.pdfIn PDF document text
    • http://uplrezina.site/77638567105qw438.pdfIn PDF document text
    • http://raicen.com/nimubezodx24z0.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/kivogizujegom.pdfIn PDF document text
    • http://dompodklyuch.com/keppel_corporation_limited_annual_report_20181r3ki.pdfIn PDF document text
    • http://proba7.xyz/235621164605ui5s.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/88737143021fgqy1.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/xekiboritexuxisol.pdfIn PDF document text
    • http://rusakova.space/drifting_warszawa_prezent9e4gy.pdfIn PDF document text
    • http://tupujetu.sportsontheweb.net/pdf_to_word_free_download_windows_10.pdfIn PDF document text
    • http://hallop.xyz/87906692915tgi2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lunodemexixape.epizy.com/pokadorugizalexabewipedo.pdfIn PDF document text
    • http://pofomabagemekut.epizy.com/48591173216.pdfIn PDF document text
    • http://kusofiwu.epizy.com/ladelagelimapigawupaw.pdfIn PDF document text
    • http://salesog.epizy.com/canon_pixma_mp250_printer_and_scanner_driver.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/wunuvafijituwujaziviboze.pdfIn PDF document text
    • http://sazeborotuvovam.rf.gd/quiste_del_segundo_arco_branquial.pdfIn PDF document text
    • http://guxenubegipus.epizy.com/kendo_ui_template_click_event.pdfIn PDF document text
    • http://kigokigaruv.myartsonline.com/totevedixosukasozo.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/380090023.pdfIn PDF document text
    • http://mexorilurolepap.rf.gd/13235939919.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5348 bytes
SHA-256: a293c8947971759be71f9c4f05b14bf054c30c12b81c40fe40587d4efe2d544e
font_01_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 10896 bytes
SHA-256: a34b35e5ebc1a4bbc8bb255b84d50e56acd2150d8f1a469f0e587ed662d9a22b
font_02_sfnt_off00011f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 17028 bytes
SHA-256: 29e0e297574b3122c9401eb31e41fc0a5378fb5e23872367debb4d6534898521
font_03_sfnt_off000137a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333