Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb879dc9ef5d0788…

MALICIOUS

PDF

67.5 KB Created: 2020-11-13 01:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1fe76f503fb7bdc02c185efc7389aa55 SHA-1: 17beb20911bff6fa49b870b3b623440a15f50dc3 SHA-256: bb879dc9ef5d078807cb1326174a74cd2ad8f72a0034b1fc91de303b44fc329f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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
  • 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/strik?utm_term=projectile+motion+word+problems+work In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fa39b80c06f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f9154184521b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3062c865-9fe5-446d-8679-703469b9eb9e/52618358837.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/minecraft_quiver_resource_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/manually_change_clock_time_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/riddle_school_4_unblocked_games_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3741d6c9-e040-4840-b95c-ca9431ab829e/70498536694.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/tomb_raider_definitive_edition_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/kejebu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/blender_guru_shortcut_keys.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/national_geographic_books_for_learning_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27606de-ccc6-4474-b6d7-b0a4f4115b74/fexadojipuparovef.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_off0000c900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC900 5380 bytes
SHA-256: 7b6cb116eb8224b38d8fc4da3f2229ecb487ff8d990b74c6be18c939b931b991
font_01_sfnt_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 11124 bytes
SHA-256: a4e64aead700274cd56040c5e029e2ca200ee3842face3b75e90548656701a9f

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