Malicious PDF — malware analysis report

Static analysis result for SHA-256 a264c63ce513d6ba…

MALICIOUS

PDF

71.1 KB Created: 2020-11-14 07:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8487768822cba0026e896260c044067 SHA-1: 93fa4afc721359f954053d3ad6f968aeb6f1c818 SHA-256: a264c63ce513d6ba394046c97a589de4029b66e0aebd4b16a60cc8038ec6d383
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was identified as malicious by a machine learning classifier and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI was found embedded within the PDF, pointing to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a phishing or malicious site.

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
  • 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://traffnew.ru/strik?utm_term=la+voile+six+fours PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456666/normal_5fa35a5b8c392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8f1c539f386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5fa00a8f73447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_5f97aac98b3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fa83db1efddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f945ce2500b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5f97244453865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f942a1f48ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8da3806447d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5f92de2667cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5f9727b090c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5f98290295c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8e6038f18b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jolufozo/buckeye_elementary_school_in_deville_la.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5cf6ba-fb13-4358-82a7-caed67085206/32807492686.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC204 2968 bytes
SHA-256: abee2b393ec2fb9fec7f30c584fa7e125e99fd0856e0afbe60a6d6a568499c8d
font_01_sfnt_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 4528 bytes
SHA-256: e1d39ee2a41dc448c249132162d46bb7bc0d532fcfe2d64e379663d7224f47a5
font_02_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 11280 bytes
SHA-256: e7f34af1239222ccc3cf40dd42f00ee2208091c4c142bf86eb248e3366bb0900
font_03_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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