Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c49723b0cee915…

MALICIOUS

PDF

71.5 KB Created: 2020-12-18 23:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 871e72b6d1979c7232c4558bcbde4bb4 SHA-1: d79be181b1e0b5e9bb59d776461252957dca2033 SHA-256: 36c49723b0cee9156d5ffdd9eea0d1db680239e41cc128b33f367bf7efe11fdc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link to a known malicious redirector, 'https://gettraff.ru/123?utm_term=stewart+essential+calculus+2nd+edition+pdf+answers', which is likely used to deliver a secondary payload or redirect users to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational materials.

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=stewart+essential+calculus+2nd+edition+pdf+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5f9fced8b4e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5fa21a9d76fa6.pdfIn PDF document text
    • http:///\/,page_edit_ph_gplus:Google+,page_edit_ph_linkedin:LinkedIn,page_edit_ph_proto:__type__In PDF document text
    • http:///\/exempel.com)page_edit_save:Spara,page_edit_note_bottom:VisaIn PDF document text
    • http:///\/play.fm\/page_edit_url_form_errorIn 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://uploads.strikinglycdn.com/files/2bd3be0e-66bd-4bb1-a709-8dec00111ea4/54378817528.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/fufefuliwujulib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27fb3239b0722913b63ef/t/5fd1f935d97b572b89de7536/1607596341341/you_are_the_reason_chords_bb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b9656b97992eb57c9820/t/5fc81c8c13f8d93bf2f774ba/1606950028638/levagifozuvowogajawagiko.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/13551204820.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d3c9d793648408474b5/1606372669061/madina_book_2_sharah.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389708787e879897c9404/t/5fc4460c5147b14804bac9fc/1606698509623/89919133665.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/police_officer_badge_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52c6ef7cf8c7540469f10/t/5fcf72b3505b451de18db7ad/1607430836012/couple_halloween_costumes_2019_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/5516327823.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/the_purge_google_drive_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 5356 bytes
SHA-256: 733fcd12d6761d19caf2f07b4ebff751f25ab36ccf6f58ae7f45baf93102313a
font_01_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 13080 bytes
SHA-256: 0fad1cd0a4c95698cd895c59bafb57c61bb4f8dabf8e065dc6636533f4a60935
font_02_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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