Malicious PDF — malware analysis report

Static analysis result for SHA-256 259998ec13e31a11…

MALICIOUS

PDF

65.1 KB Created: 2020-11-23 16:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1f98830aec412bd36c2179db56a8faa6 SHA-1: b9d54a5f309361f654352ac39372d86633bd8737 SHA-256: 259998ec13e31a11f276b1640eb47c4a4f6745ca2c2a1aae540c73c36d931af2
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of compromise.

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/123?utm_term=inquietos+del+norte+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5fa5bab24f586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5fafeb8023998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8ea3ea6f388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f9b550e97c98.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/gedimuta/green_lantern_coloring_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278b1d1a-80e5-4c01-a143-1f7251c4f3b2/hot_wheels_guide_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3363e6bc-eceb-4a7e-be43-086d5a6b438a/dejong_neurological_examination_eboo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dca531-3e2a-4759-896d-7629b27fdabb/2000_toyota_celica_hood.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/schubert_erlknig_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/rang_barse_song_free_songs_pk.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/christmas_images_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/52854732347.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/holy_bible_kjv_with_apocrypha.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/76136774360.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_off0000ac7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7E 4944 bytes
SHA-256: a5412d772f8ffe6e6ac56e13bc166ce18a455c747b584ff30c5c6a57a57da333
font_01_sfnt_off0000bd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5B 11328 bytes
SHA-256: 07f329fa8f34939866de31adc5ee60d5e31f1cf538bda586d56c5962b41ed878
font_02_sfnt_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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