Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff8c75fc583e2bd…

MALICIOUS

PDF

96.2 KB Created: 2021-06-13 16:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d4cb6f40c76cd4d08051a3575f2bd6bd SHA-1: ad4cb52e7688f394be2d933c8199be804a21b505 SHA-256: 0ff8c75fc583e2bd7d38cfb0322ed97baf717522f0221d1ec68f77c7ff171247
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a download link for a 'Pokemon adventure apk'. This URL, 'https://synerhu.ru/pbw?utm_term=pokemon+adventure+apk', is likely a lure for users to download and execute a malicious application. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=pokemon+adventure+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451945/normal_603e65a2215ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_604825a81e173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6051f1252e26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fe91b1c00548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_603bef0f3686b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488141/normal_60aff390c1e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_60593b4448063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456996/normal_5ffb6c4081f21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fddb0231fb1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_60c39292898fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_60248068ea1af.pdfIn 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
    • http://fisaramunuf.pbworks.com/f/kikurafapakobajubewip.pdfIn PDF document text
    • http://lakobun.pbworks.com/f/dr_harminder_singh_pannu.pdfIn PDF document text
    • http://vevokofeju.pbworks.com/w/file/fetch/144657765/koribijad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1761df88-4146-49db-bb4e-e538755ecd50/47380359261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a16f83e-d0cf-4999-89e2-47f2cfc2bd8e/kunogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35be2998-4acb-448a-a7c5-fd58585bf8e9/99567922988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcbd276-ab0c-488a-a5b3-a9163b53f959/50577603249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39182052-2464-41b9-92d2-0f3ee593dad2/how_to_reset_rca_universal_remote.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E34 4852 bytes
SHA-256: aeaa4da117042a14630fa40c6b0fbdd8c98230dce001a8aad9832e402c4698cc
font_01_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 2168 bytes
SHA-256: 65b53f05ee2a0f6f1f28596c7e608170b4565187c82a66feb2d949b702f73d1b
font_02_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 11700 bytes
SHA-256: ece98547bf12e1b64e67faa2b4c613406825014aafe0ffb166a705a8f39f46a8
font_03_sfnt_off00014f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F4D 16272 bytes
SHA-256: 0d6625cc0c1c5d477e6848730438c398cb7e7ec54eb09158c1993e91afbfd007
font_04_sfnt_off000164de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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