Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cab49d8e40850c5…

MALICIOUS

PDF

57.6 KB Created: 2020-12-09 17:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 83129c4a707d10a7b12daae039878538 SHA-1: 889fe4dd7e219fcc63bfdd5eff3da97e8dd53348 SHA-256: 3cab49d8e40850c50599575ba451887509f812ba01bc94e927167f2d01318ab8
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/strik?utm_term=loren+gray+queen+1+hour'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=loren+gray+queen+1+hour In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fc4374400210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fa93a6eafec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fa0fa1e4d5fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5fa0ed0b628fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/fibavavuzarixopuzimib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a40f6a-e9e7-44ee-978d-30bdc3d930f4/woxugowipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0ada78-f9a8-4d3a-a2b4-7d60b3e16cc3/dds_plugin_for_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d69215-20f5-469c-9d07-dd112aaac67b/pilotufewonivererer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9bdb65-bcda-4c5f-a61c-24bc9cfeb580/blue_planet_world_biomes_webquest_an.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/cbc_with_manual_differential.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6ee145-0284-42c3-9da6-935c94f56e57/kesazezeteluxatil.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/bilibili_tv_box_apk.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_off0000a739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA739 4956 bytes
SHA-256: f1f42ab41f083e6234a2bdecbebf93740cd98d8c918ff8f239baca893c05087b
font_01_sfnt_off0000b81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81F 9980 bytes
SHA-256: a53ce708baf1ccbb82e443aafe9163dbe40f86671ec1d419b576f48c22d3d635

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