Malicious PDF — malware analysis report

Static analysis result for SHA-256 b630cae7c68fcfdf…

MALICIOUS

PDF

82.1 KB Created: 2021-04-01 22:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 81b386bef1a0d5de9e436004e33842fe SHA-1: 0d59c9942719772c6ecd97491ef4fbfc57fcea72 SHA-256: b630cae7c68fcfdfd258ad828b304d7891ff8c59681985367744d1a89dfa6067
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://dafemum.ru/wix?keyword=the+guide+chapter+summary+13'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The embedded document body text is heavily obfuscated, but the primary malicious functionality appears to be the redirection to the identified URL, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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=the+guide+chapter+summary+13 In PDF document text
    • http://pimifawimonidij.mywebcommunity.org/dos_command_examples_batch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_601991f59cbea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_600c8d991b593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_6051dfc41a85a.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/16134953806.pdfIn PDF document text
    • http://nojigopagapusu.mygamesonline.org/95167105719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipupirewikome.rf.gd/aa_attendance_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/wifapopitopasefuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/94601784900.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/80169576145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8596e990-0f7a-48d6-8de9-2f2510227532/what_does_a_free_arm_sewing_machine_mean.pdfIn PDF document text
    • http://zeteximezoxa.myartsonline.com/4264309991.pdfIn PDF document text
    • http://xonatude.epizy.com/arcane_legends_mod_apk_2._5._2.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/blank_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/what_makes_a_good_fictional_couple.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/17115495767.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/49119674788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bb3f68-0517-4c85-82bd-608d16113b8b/john_deere_d140_48_mower_deck_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab419347-2067-4bde-b2f8-3ac6db4f993f/29852582341.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/work_cited_mla_format_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/worobanerilatoro.pdfIn PDF document text
    • http://rudogebititugi.rf.gd/car_spare_parts_name_and_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eeb1ded-807b-45d7-a811-a1b2732e5ea4/how_many_players_can_play_joking_hazard.pdfIn PDF document text
    • http://dapunujunet.epizy.com/the_big_bamboozle_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/android_10_c_g_mi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 5724 bytes
SHA-256: 4c0600c09186965f1d64c7d12e850c16652cb3647ce3c3364660388fffb404c6
font_01_sfnt_off0001144e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144E 11312 bytes
SHA-256: 84ff0b93b58e92387565ab014030e2b8f5c032b95e83656f43838dcb98fb32bd

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