Malicious PDF — malware analysis report

Static analysis result for SHA-256 7393423845d1d9ef…

MALICIOUS

PDF

52.6 KB Created: 2020-11-06 20:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab0f97fcd7c813ce3195986a966fbaa6 SHA-1: 56e0997b34fb25097b88f26f9151ad8df8a0cc48 SHA-256: 7393423845d1d9efa33eb42afb42ed3e6032e8aa998049cd3a417b504380f0dd
136 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with 28 embedded links, many pointing to other PDFs. One of the primary links is to 'https://traffnew.ru/wb?keyword=mmd%20motion%20download%20free', suggesting a lure for users searching for specific content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic to bypass gateway scanning by instructing users to decrypt an archive, implying the document is a precursor to delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffnew.ru/wb?keyword=mmd%20motion%20download%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5fa547beee610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f94945c407ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f93dd2cdedfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f893d8487375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fa2d95cf25ea.pdfIn PDF document text
    • https://zonisobeb.weebly.com/uploads/1/3/4/3/134333784/5f737cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f8a342153ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f8f860d9d92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f9369a19a50d.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bde83c-7114-4246-b37e-82c71bd3f904/varonaxazesov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7356084-c1d0-4bae-a4d6-4bc415128738/the_quirky_tale_of_april_hale_preview.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://waroxepala.files.wordpress.com/2020/11/wawoladiwep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227f37e6-8e50-45ae-a74d-84fb422e7a2f/vuveto.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_off00005cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAE 5156 bytes
SHA-256: e5fd2e108cd2d162d79257bfa2d7c6521daea1984c50e88d3e61f07a8c155b77
font_01_sfnt_off00006e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 1768 bytes
SHA-256: 4d48c425ebef90c2d02d06bcf645bfe766804625a466b4613fba07e24684c3c9
font_02_sfnt_off0000772a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 4972 bytes
SHA-256: 6615d6a138bba19b4f7fc664cc70bd453bb93cd2551d68795ffc54e1f658c963
font_03_sfnt_off00008817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 11428 bytes
SHA-256: d37a1ca42e5fe58eae84189ae874e05c42d6d251176cfaa8c271e97956940389
font_04_sfnt_off0000aecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECB 16284 bytes
SHA-256: a2ef69acfe3d1e3efc1f68f5d9138a8584d27d81235eacf2afbb516c11f1950a

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