Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4a122e7f56d97e…

MALICIOUS

PDF

66.4 KB Created: 2020-12-03 22:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1db66aeb0037df5f4397ce73a3958db1 SHA-1: 9d17258001c76df13ee8126a1ebbb9d8d307b10f SHA-256: ce4a122e7f56d97e063d5611130256eb77e6df66c0fcfdf6cf3c13f3f1adb42d
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://traffine.ru/123?utm_term=hillsborough+county+schools+spring+break+2019'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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://traffine.ru/123?utm_term=hillsborough+county+schools+spring+break+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fb02d7fc7c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fb8da9790d6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3a7a211f6a4198496ed50/t/5fc58a2f145a8629dc6f3ad8/1606781488200/brady_bbp31_troubleshooting.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e3ecc14dfd36fef16b99/t/5fc1e727e6d49a06bbd75f04/1606543144398/falta_de_educacion_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfbb708-c9d6-440b-a432-ea0bbc2e8881/7_spline_lug_nut_key_oreillys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4749c2f-a6fa-423d-8e8a-afc1218e9b7c/derimuwojes.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/bpce_assurance_voiture_relev_d_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe189b61e25426e101426d/1606293667065/minecraft_ore_mods_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc26e6e3f75b1664322bfad/1606577775263/riesz_thorin_interpolation_proof.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/20913412322.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/70166215827.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_off0000c61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61E 5944 bytes
SHA-256: 36691ed0309c10264cee5bc15277999bf5f505e4bf5687be8dc741b3eaa03411
font_01_sfnt_off0000da5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 10136 bytes
SHA-256: 69353f2329a62b787ccb3db5d008f49fa6cbe1f6a04260f692b604371845166d

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