Malicious PDF — malware analysis report

Static analysis result for SHA-256 286d3da214d9e9b6…

MALICIOUS

PDF

75.5 KB Created: 2021-01-20 23:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0d69009de933eb075f4fbf46e30ab620 SHA-1: 21f9810d41048cb913947a32d9b4c951af0c408c SHA-256: 286d3da214d9e9b647c28eac60e5300c406a037bd4805d6cc7b3779e1cf187a7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=anthem+combo+triggers+challenge'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/123?utm_term=anthem+combo+triggers+challenge In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fa2f398a46db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_5fdc8cb5c0464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5fdd59ed2a4f1.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/hhm1gMI/warlord_games_samurai_test_of_honour.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fa6cc94772b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5faeb310154fc.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/zgjGYuM/carnivores_dinosaur_hunter_reborn_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5ff5d4f282b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5f9bc8f6667f8.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/FgeLQjd/world_war_2_movies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5ff64f3a07267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_600038f535ed4.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/towutoginadivu/losalebodenoporuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/metal_alloys_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/competency_framework_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/capital_letters_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/footer_in_excel_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 2860 bytes
SHA-256: edb879179b1e464f7bc9fae20d19ebb0986f90f28db1106eaa3b5b242aed6ed4
font_01_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 5340 bytes
SHA-256: d1591cf0de1b05fa308b2baf858eb1bb1ee9f24ed1683ecc49d37248e5b93057
font_02_sfnt_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 10304 bytes
SHA-256: ca2cac4192faeef35c5e96cade14d5c267140195d30a8ed2a6fefed7e15037fd

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