Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b6bc8353c0bdfd…

MALICIOUS

PDF

51.4 KB Created: 2020-10-18 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e4a765f5d4faa2cbb59dd725e1fda491 SHA-1: b9cb4678455606b60ca4299d87acbe191bbf578a SHA-256: 94b6bc8353c0bdfdf03f05300a70d59bd90acb53b7778b1dcf3edeffec89a897
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which in turn leads to a URL related to 'wpa wps tester premium old version apk'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The document body, though heavily obfuscated, contains references to the same URLs, suggesting an attempt to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of multiple external PDF links indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://ggtraff.ru/123?keyword=wpa+wps+tester+premium+old+version+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87ac7e1951e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f883a405fabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f8b38e583d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f871971ea01d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8af33665888.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/eb936d0.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/pojofitozebul.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/e7a392c.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://uploads.strikinglycdn.com/files/ebebb3c5-23af-438e-998f-50d5155d420b/7153723164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/837ebdbb-4da4-4101-9252-5743b76ca414/56612372992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0340d3-b672-46f0-bc51-6a4bfb750297/woriduxaziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0bab46-c1aa-47bd-9eab-067c9457e5d2/95299035691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/25942918672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1770/5893/files/vewopilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/rexawed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/thuricide_bt_caterpillar_control_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa94d77-a3c3-4c36-aab9-f7adbcb8351f/lewitawukurafedup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053bc727-dc96-41a0-b589-598f37d24953/pokemon_sun_and_moon_download_apk_ro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af7a02d-1d77-4d74-b9e2-84188fc6d551/pimil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22671170-d5de-48d5-b593-04c417fd5bb7/wuvunobakopipipola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ac6d88-2b9a-4614-91da-6168e4f8854d/99670611603.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 5216 bytes
SHA-256: 8acc0048aa228711fd617935a82e07b1000dda7375c652ae04981e7eb923f0c4
font_01_sfnt_off00007e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 16836 bytes
SHA-256: fddd91a15c4c0b004c831d104a2d8f9157467bd9e5a052216730b04915d9231b
font_02_sfnt_off0000b247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB247 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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