Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe53ad181a04bb4…

MALICIOUS

PDF

77.0 KB Created: 2020-11-20 05:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c46094dedd4fbbe8dcf569c5e423f057 SHA-1: 0d4dc7fdf4cf0fc1d00cd048d021d3d813dc3e8f SHA-256: ebe53ad181a04bb430e982737352d7b64a2d33bcd8a9f0525c739b08c21a489c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/123?utm_term=adobe+photoshop+cc+classroom+in+a+book+%25282015+release%2529+pdf+free+download'. This URL is likely used to redirect the user to a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=adobe+photoshop+cc+classroom+in+a+book+%25282015+release%2529+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fa3bb1781aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f892e1dcc445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5f9ad19ceda06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_5fa8b6a13fa94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f89fa892ac32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5fa1b1f2d1cc7.pdfIn PDF document text
    • https://gikexirubunos.weebly.com/uploads/1/3/4/6/134644737/kejaruw_kemeveweru.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/9990151.pdfIn PDF document text
    • https://nozigofomin.weebly.com/uploads/1/3/4/4/134481739/7533893.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/siwumudivisoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f871e37b65d1.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/xazuwesego-nujelakog-tujagobupojagid-dotunofatutuxu.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
    • https://s3.amazonaws.com/zemigiduwagafu/zudevajedipusalovenurug.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/working_showbox_apk_august_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/95407375008.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC770 6072 bytes
SHA-256: 10e3818cbfc48ceddc3f929b1002d379c56118fd90555b2c6d6f64a35f514eec
font_01_sfnt_off0000dc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC16 10792 bytes
SHA-256: 27fc1579300249b7f49c5bcf957b9123b5f9afeb8861860a14e760e2e87492c1
font_02_sfnt_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 16132 bytes
SHA-256: 1dc3e4c0df5ca4cee3a891f28fe896d6b16a951626fb4346f09e4ab97736c5fd
font_03_sfnt_off000115ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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