Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85524c49f9dcb4e…

MALICIOUS

PDF

65.4 KB Created: 2020-11-24 13:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 42d30e07c8dbebbf008bdd505c335710 SHA-1: bab3357e96cd4c01e7ab14e269f57ba721b40d83 SHA-256: e85524c49f9dcb4eba7c05b89d465196ef65b8ef72622e66930719f4feb62783
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://cctraff.ru/aws?utm_term=orion+starshoot+autoguider+setup'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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://cctraff.ru/aws?utm_term=orion+starshoot+autoguider+setup In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5faf97c944655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fa14e8061b0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d934de-9286-4353-8567-d5df4450d48e/everybody_loves_raymond_full_episodes_sneeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06da12c4-eb1d-4835-8904-4a9b7bd2a580/pusivefasolepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe15f86-4736-40f3-a552-ae2fd64decb5/manual_muscle_testing_knee.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/mafuxofitugezifikinifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca0b96d-5a83-4f5f-a453-ddb554623d37/63971830154.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/zonuzekiro.pdfIn PDF document text
    • https://s3.amazonaws.com/virumutipalis/77891744370.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/lokozuzakifotux.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/tojowiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633c2b57-6154-4827-8972-aaa239069d59/dosefalinonilinofe.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/25520224030.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/nadia_from_american_pie_actress.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_off0000c205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC205 5216 bytes
SHA-256: 1b922a2f24743244a81bdd442651c1125e6c875f430341f477aeed0a5e5b8370
font_01_sfnt_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 10816 bytes
SHA-256: fdf8aef28d6851560e9574b250a380cff5b0ddaea1bc5bfde7757c97ebb394de

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