Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3b6818ef16dcf4…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 06:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7cff3da9fa7498715ed2201e8797eacc SHA-1: 218b3e095efe066fd6c1805592845bcbbf227751 SHA-256: 1d3b6818ef16dcf44109179c8238d04f8f046066484eaa1acffad435cca7bad3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as interview questions. ClamAV and ML classifiers have identified this PDF as malicious, specifically a phishing trojan. The presence of embedded URLs and the nature of the content strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dugedepap.ru/strik?utm_term=interview+questions+for+math+teachers+pdf PDF link annotation
    • https://cdn.sqhk.co/litawoxelida/gjJjbjh/26175878618.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/fjjjjcc/32354493900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5fd80d965d864.pdfIn PDF document text
    • http://repochka.site/hoop_new_friends_on_snapchat_apkciqo4.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/vjbY1cf/simple_drum_loops_free.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Ejdy79R/poker_game_world_poker_club.pdfIn PDF document text
    • http://about-fb-support.com/how_to_use_ariston_washing_machine_margherita_20000lkwz.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/fgdTqjh/jolofunifaxipukubexan.pdfIn PDF document text
    • https://cdn.sqhk.co/tarozawowe/ihidNge/pebavukijatosev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383797/normal_5ff58753b8305.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
    • https://uploads.strikinglycdn.com/files/989734a4-2c22-45e5-8782-cc8d0e0c32d3/vokebepajavexover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f080d0e-6bf6-4138-855b-bf1dd5a76534/what_is_a_wake_for_a_dead_person.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/zumobisozuvobebelewunasix.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/calendar_template_2019_goodnotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba82c1f2-a81e-4f1e-b200-15e9ca27f7c8/3862524785.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_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 5460 bytes
SHA-256: 64acd0204af1cc276c0a96aa045fb2e72e365b1c77068f4b079f4b4b5bccc3fd
font_01_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 11028 bytes
SHA-256: ee0381c91af37dc6418464e9992348b863ac2e24b404f8a65904d62bf7be42ae
font_02_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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