Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36c8d0aec510100…

MALICIOUS

PDF

71.0 KB Created: 2020-11-19 06:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 18dffe4b8340a496790bcc4c9b6507eb SHA-1: 2f853821abd4d244bbe00619c7eb94326b3eeb9d SHA-256: f36c8d0aec510100573f8857f5bf4128a3b56672ea40a0cc8b01e2e58c63ceda
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 0.9997

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://gettraff.ru/123?utm_term=rolling+sky+mod+apk+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fad32a0ab08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fa61783a6ef9.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/838b4f0d-1b45-40d7-b147-62d3602dea41/saving_sourdi_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/basic_computation_principles_of_computer_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/knitting_loom_stitches_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f715213-f215-4904-8a3a-1527fce22872/jekotomolebefefomeviz.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/19716515046.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/ariens_deluxe_24.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/ruferesazikesufa.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/lamar_consolidated_school_district_-_richmond.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fd3d5c-cf89-4906-adb5-969e9dbde4e6/ruropatuxopokisejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad678391-4b8e-4fd4-a2cd-29bedb56ed92/losudenumazonure.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/4804987352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12450a63-744b-4a96-9953-850079515228/89140516998.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_off0000d6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 5628 bytes
SHA-256: 05d19a0b9bfe681e6959197eaa823c6724d11966b8f70478e560207fcb94e24f
font_01_sfnt_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 10952 bytes
SHA-256: 3eaaad043d8786ebc661a80bd0f7acb1537826b8d644f25532df44469077e158

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