Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d67c82e2dfffba…

MALICIOUS

PDF

69.9 KB Created: 2020-12-19 13:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9d993e4f1b8b666a125a68ee6f8e9c00 SHA-1: b21045b0cbfa0d3f7c8a1ec5cd08d778e63d6dcd SHA-256: 19d67c82e2dfffba4b486b2f6035e6458ba194dea60ef096edfb5d9708add57f
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafficel.ru', which is likely a phishing or malware distribution domain. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=the+room+3+apk+full+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5f934f1f803d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383302/normal_5fc54e692b143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f9e959ac2da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fdbe4bf19bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5fa4992218006.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/5fbce344be7cfc36344e8aaf/t/5fbe16ca08845d092452594b/1606293195089/counseling_center_for_wellness_sidney_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09281770-c1b0-4713-a5cc-ff61fe06270e/amine_400_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e0bb9f-2eff-4828-ae99-4adb66556125/bikevaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564ddf84-3bfd-43a4-9655-fc65e655d2b9/79495397720.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597dfc6229360ecccd2a7/t/5fcf3053b8233e30dfa61448/1607413844142/26025414227.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc1b58d5147b14804732706/1606530455728/ftm_hysterectomy_recovery.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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 5372 bytes
SHA-256: 074e7a073683c171f2107498a4628b8da2fdfe04a2ee4c0b5d952fac3728287c
font_01_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 10936 bytes
SHA-256: 72e528fb354f6cb5bbbed0ef751f86c1b9106ea96e50ae81a556a56d7bc92615

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