Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c612e98e96a24a9…

MALICIOUS

PDF

258.2 KB Created: 2021-04-02 04:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b185d2a2f61dbf7401812c89adb3041 SHA-1: 90a00d0d974f95c16f1e2b22c4586d24a3c990eb SHA-256: 7c612e98e96a24a911277458b98cfe2ee8c15c2e2ec6e012e076b8a42ae10a44
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://druttle.ru/wix?keyword=ospf+hello+packet+ttl+value PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405929/normal_604ca81f0259c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482207/normal_5fedf798bdd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_5fe9e2662f94c.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/9519608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489980/normal_6062b630a8a40.pdfIn PDF document text
    • https://midepixa.weebly.com/uploads/1/3/4/6/134622545/4118740.pdfIn PDF document text
    • https://kavuxidawikux.weebly.com/uploads/1/3/4/0/134000359/c3443728a431c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5fe75becbefb3.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/1770746.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagilupakov.rf.gd/94718004414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ead5ec5-2bd0-4e88-831b-d0eca58dd4d4/87588949114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0091260b-9b61-4d98-9860-7918ff0de1d9/wesizage.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/john_lewis_egyptian_cotton_sheets_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/5631952642.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/47711801154.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/muluvabawogevasir.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/49245405544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eda92c-a0df-4ddd-8962-e1d6f893bf62/literary_analysis_essay_introduction_example.pdfIn PDF document text
    • http://lexifuborikaxu.rf.gd/wojufonevopinup.pdfIn PDF document text
    • http://vininotubosom.epizy.com/delopidov.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/the_last_dance_encountering_death_and_dying_11th_edition_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/letedijitejulokuxesan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e39218-512a-4fb2-9f95-b47e38d51ffa/who_killed_the_grand_inquisitor.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_off0003c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C1D2 5156 bytes
SHA-256: 26575f1d4a97113eb30ee7536d4dd638f43115b60f2d32985772fefa95b67459
font_01_sfnt_off0003d363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D363 11396 bytes
SHA-256: 1a46c87dc46ab9388d81cc7acb2142ab182ea1fa5f008bd68e799d9dcd44a084

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