Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3baa67aac8dcdf…

MALICIOUS

PDF

67.9 KB Created: 2020-12-23 03:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e68f0758e7154aded9dd317987d008 SHA-1: 42e9abea8457dc6f989e69de55d6eb14a386f575 SHA-256: 7b3baa67aac8dcdf2b3d7f1cbdead36d63c5b2214094796a67d35e2ceaed59d0
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, suggests a lure related to 'Street kungfu king fighter apkpure', likely to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=street+kungfu+king+fighter+apkpure
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/zawojubufa.pdf
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8890f4259b5.pdf
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5fc7d65e22aeb.pdf
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5fb4c85b900a2.pdf
    • https://cdn-cms.f-static.net/uploads/4468831/normal_5fad3b0578aac.pdf
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fc4794682beb.pdf
    • https://fexifeter.weebly.com/uploads/1/3/4/6/134612515/zamivi_muxameropeg_mafekaxarajuzan.pdf
    • https://cdn-cms.f-static.net/uploads/4484143/normal_5fb59eead8fff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6ef93b1a-bd8c-4042-8f1d-632b2eab8658/dr_asp_occitanie.pdf
    • https://uploads.strikinglycdn.com/files/795a50f7-1e86-43e1-9341-486176bab17d/ebook_exam_ref_70-761_querying_data_with_transact-sql.pdf.pdf
    • https://uploads.strikinglycdn.com/files/574427b4-a62a-4f91-9bfc-ba6ad479ab6d/pepanefezavirugazuwa.pdf
    • https://uploads.strikinglycdn.com/files/9bd4853f-f8a1-4773-abee-c3a942b951f2/29052677328.pdf
    • https://uploads.strikinglycdn.com/files/26707f86-4509-4975-b88b-76c68b346bb5/99256662677.pdf
    • https://uploads.strikinglycdn.com/files/048e586e-6e44-4ac9-8135-7fccfad5bc35/haiku_poetry_graphic_organizer.pdf
    • https://uploads.strikinglycdn.com/files/0aec817f-fdcf-4767-bf7c-1687f09a79d1/old_french_opera_house_new_orleans.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca89.bin
cc3c41946360c52ab8cef5d7a8bb9e848ffb377ea21a5d5612efbcfc17d6b973
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 5120 bytes
font_01_sfnt_off0000dbf6.bin
75c6def5ebabbbda2e0e2cd000f171414a32b4aced8a024ec0834e16046dfb4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 12408 bytes