Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c422a0d74154c7b…

MALICIOUS

PDF

74.8 KB Created: 2020-11-01 11:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 611a656682784e8760b1d234cbf2eead SHA-1: d520ce8c6f2f86d17b5b826a73b41f4afc4fd7e5 SHA-256: 1c422a0d74154c7bd6d305d890d7eded44a4223af6a39a3943664e9c49a9833a
94 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, disguised as a download for a 'Wemo switch app'. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is associated with redirector services. This suggests the document is part of a phishing campaign aiming to trick users into downloading unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/pify?keyword=wemo+switch+app+download+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f8bc9525aab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8807471bac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8dbccc6bb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f909b00b9cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f8a5460d04d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/c300_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/63293559785.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pdf_annotator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b6663a-2ffd-4e33-8dd2-d0537d6bbe13/fulamopijiwoliwilojaxagok.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/3360093141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c481136b-d121-498c-bf81-8ca2889db9f9/51865932400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230352ea-8d43-47b8-be23-f988439e8a53/movozomiredibisumowuxewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd562a22-a50b-49c9-96d7-105507f9da57/all_types_of_triangle.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/hebrew_alphabet_vowels.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/begowedifalugevanuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3916f5-8319-4aa6-ad2d-9c5fc5f6003c/nebuxixojokuvevupamuno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04A 5500 bytes
SHA-256: f0cba84792b8dd92c2164eb34316f14d089ac3810a4d409b48277540853355e6
font_01_sfnt_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 11160 bytes
SHA-256: 1b3eae2670ed05d08d50d598a678736144bf1fe1dcdf6c00c58ab2e95dbe7188
font_02_sfnt_off00010930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10930 16068 bytes
SHA-256: d7b25dc5f512836eb4e96674031d2352042d4610eccc34473d5b6aff049d846c

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