Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d0ab9d737d8ccf…

MALICIOUS

PDF

115.8 KB Created: 2020-12-16 22:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d1fd74429a65235539d3dacef8f77f1c SHA-1: 61c2048930bf5d40d8459d2ded16d742a5610d54 SHA-256: b0d0ab9d737d8ccfec077c33b7ebb819fd8aa4a814b80c069653f0ea5589f675
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 0.9982

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/strik?utm_term=probability+random+variables+and+stochastic+processes+3rd+edition+solution+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_5fbadfbf8e12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5fb5774027455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367005/normal_5fc7df8e35b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8d3f20ad729.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/5fc67f9ce5c7695ca9c21019/t/5fc9d156d7c3040d873248d1/1607061847415/63034596827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5b6a52-6662-4856-a508-b5756f3364ec/43440019262.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceef568bfc51861666a46/1606217463442/what_is_ahr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2181a11f-e5e8-46a8-b188-db6b6426cc00/71847098634.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fc265519ee0f32b87a088ad/1606575445839/veditz_preservation_of_sign_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cee92d-caae-41e7-9aec-2704e78e6a23/xupekuvagiguleju.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 12748 bytes
SHA-256: 9e773fc3e682d33679079c1356a9ea6921a42747ee1810c131fae8fb1c4f3447
font_01_sfnt_off00014a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A73 5780 bytes
SHA-256: f6e06daf00c758435a18073c900d47e10158084b8c2d9ad0c4dc251aa9bd0a2b
font_02_sfnt_off00015dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DFA 2616 bytes
SHA-256: 237aac50237282b8a6bcdb73e5f02a7642669dc98daf6acf60458b65e1714515
font_03_sfnt_off000168b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B9 14844 bytes
SHA-256: 38c846510b3649709e9addb264c2c11482cad866aa5192c3cfbae43b1e5bd610
font_04_sfnt_off00019b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B87 16292 bytes
SHA-256: ecfc2e03571ed8fba48e3fd66f3a42bd9bedf529e60496e62a2dda66d20010a5
font_05_sfnt_off0001b131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B131 6068 bytes
SHA-256: 9ee40c72548f11b0f38f8baffca441a734123f1dcc0a203021cd8cd9097e69ef

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