Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c42d841fc7c883e…

MALICIOUS

PDF

78.3 KB Created: 2021-02-28 12:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8abe6b4d019cf490f1d5324f6175a724 SHA-1: f4e14b3274674772d530d30c70e9ee2921bb36be SHA-256: 0c42d841fc7c883efb3459c7e6370d6e84147ed76ac5edf6e9d8851977e62bb1
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The embedded URLs, such as 'https://dafemum.ru/wix?keyword=pathfinder+kingmaker+necromancer+build', are designed to trick users into visiting potentially harmful sites. The ML classifier and ClamAV detection further support the malicious classification, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=pathfinder+kingmaker+necromancer+build In PDF document text
    • http://senenetikoxikom.22web.org/70890551551.pdfIn PDF document text
    • http://toportt.online/baskin_robbins_full_sheet_cake_dimensionsay5ln.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/iegegej/dhoom_2_full_movie_download_filmyzilla_720p.pdfIn PDF document text
    • http://rebelliona.online/civ_6_gathering_storm_germany_guideu5v1r.pdfIn PDF document text
    • http://uplrezina.site/452029543644jxry.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/yUgiiKc/pocket_option_broker_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/grgdwgh/68657487473.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/tusibagomegimegi.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/gjbgjgm/la_reina_del_sur_3_cast.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/facebook_data_analytics_toolsugl0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/do_they_still_make_magic_chef_appliances.pdfIn PDF document text
    • http://dimuwebogikufuf.rf.gd/45994397663.pdfIn PDF document text
    • http://pixuxurarosu.epizy.com/brilliant_quotes_apk.pdfIn PDF document text
    • http://rogofijanititad.epizy.com/68383740318.pdfIn PDF document text
    • http://taxudawikiteman.epizy.com/8027339988.pdfIn PDF document text
    • http://zegisaxan.rf.gd/dafapetujuzuritapikesa.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/5_lined_skink_care_sheet.pdfIn PDF document text
    • http://fujunaxukipasin.rf.gd/coping_with_depression_worksheets.pdfIn PDF document text
    • http://gikunipif.epizy.com/aaru_padam_song_masstamilan.pdfIn PDF document text
    • http://wefofumerari.rf.gd/product_rule_chain_rule_worksheet.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_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 5460 bytes
SHA-256: db51c98e5c59a7fd084a9eeec962fa88ca80cf0001d080bad67e11838d85848d
font_01_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 10212 bytes
SHA-256: f6727200daf01eb6b82f200e556ef12fcf1ab70d67e87e674d0b6baeaa814904
font_02_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5

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