Malicious PDF — malware analysis report

Static analysis result for SHA-256 371d09e57c3ed5d9…

MALICIOUS

PDF

67.9 KB Created: 2020-12-05 12:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 74b456063dee330a9544cb90595ad9f1 SHA-1: d883d3280289d66eaebc0a064479d3da32feff37 SHA-256: 371d09e57c3ed5d92487ad1b5962e2e4ce650919510faadaf39ff7dbee7dcb5a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=the+shack+book+free+download+pdf In PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/wogemazunisowaka.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/xoxozid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416789/normal_5fc47d402ab3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f98db6e562aa.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/0585f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f9174520dd32.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/vofadoloves/mepuxasenasoziketujabake.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/arduino_wifi_library.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/66595420738.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/93247185226.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/jofalo.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/41927674464.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/90373601707.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_off0000cc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC64 5488 bytes
SHA-256: 19268213154e51348a0b37ad1cbb962abc87491473ccabe8b04d96c91a58a938
font_01_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 10328 bytes
SHA-256: cc39cf434a4bd63c5f2b3fa03e370644e0ec5ce01445a85c74e00a87dc4fae50

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