Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a88a8ae0b828810…

MALICIOUS

PDF

63.5 KB Created: 2020-12-30 18:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7c1d35580c85f7f4d4c1f99d6b23f0ba SHA-1: 62fa7aa8d9344f27e92d859f990679b7e1231628 SHA-256: 0a88a8ae0b8288107348530be6196558a0de374c92cb2505d04d2b424a421fae
194 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://cctraff.ru/strik?utm_term=ultraman+tiga+art+master+3d'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?utm_term=ultraman+tiga+art+master+3d In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_5fc87b1828b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_5fb9facfe64a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fe5d24ed347e.pdfIn macro / runtime command snippet
    • https://s3.amazonawsIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/zoponavovopupawerejim.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/55064155791.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/cmd_full_form_in_water_consumption.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/adobe_after_effects_cc_2018_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/26439080762.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/arm_assembly_language_programming_100_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3516cb-4bcb-421c-9f6b-ca55e5c76dd6/1774353581.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_off0000bb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7A 5300 bytes
SHA-256: caf872a930aab5700ea66d37e314cdfac45c0437cc24e56bc4a989fd3859c75b
font_01_sfnt_off0000cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 10576 bytes
SHA-256: c50c81215324d2d0eb2c315c626f4df70287297c80e6b605b209362604674c09

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