Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe9152b744607a9…

MALICIOUS

PDF

69.3 KB Created: 2020-12-14 04:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6cc8b67c327691ad564c87d2f9233f23 SHA-1: 1928ca7b76f1c25a2e8ca4832c1ad602b18bc85d SHA-256: 9fe9152b744607a9ce3f1890091fe5c3aee2d169c5401e506479bf6062169112
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'grand summoners mod apk', suggesting a lure for users seeking game modifications. The presence of numerous external PDF links, including one pointing to a known malicious redirector, indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=grand+summoners+mod+apk+3.5.0 In PDF document text
    • https://mogugadikawes.weebly.com/uploads/1/3/4/0/134096191/fabuwu_rofegugumelo_gafele_dasuxemanetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489980/normal_5fafb42b032ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f9e30b625889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f9c4c646456d.pdfIn PDF document text
    • https://zidajikivumab.weebly.com/uploads/1/3/4/6/134625594/xonixevupis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f880aa3960eb.pdfIn PDF document text
    • https://mapupuvegov.weebly.com/uploads/1/3/4/7/134712300/laxusox_penuvuk_sunof_momanan.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/5fc4c63dd26ff1194f8cbdd0/t/5fc67e144e98326c02f2bd9b/1606843928682/stack_fall_3d_y8.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71a03f784ea51367e4fba/t/5fc99acf2f5dbb44b7759158/1607047887722/xegevejejekarapopa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48ae5147b14804292197/1606371502764/bearshare_apk_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0af1972c46e3c645251/1606283440051/96171381106.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d673c02f22b9d039e5c/1606372713829/mefesetiwezazibosekutum.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_off0000d12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12F 5628 bytes
SHA-256: dafdadc22553a3fb6116b0647322e18e194c8c25f84c844c417fd4c71482d1e5
font_01_sfnt_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 10552 bytes
SHA-256: 786dd9cecd2a7601c940862e2e0f152e6cfc302e36af2d0731f8861f0a1f0447

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