Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a04d978d26442d…

MALICIOUS

PDF

66.1 KB Created: 2020-10-21 19:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2773bf4475306f7f589121f74199c428 SHA-1: aa99fc5ae803dfc262fb7c19da6ce64fe00bd5ea SHA-256: 27a04d978d26442d3b54c1eb22089959e739c7a5df62b252ee542bfa73250a6e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to lead users to malicious infrastructure, potentially for further exploitation or phishing.

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://gettraff.ru/123?keyword=unul+dintre+noi+minte+carte+pdf In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/646820.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/remin.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/lofokakamegifuluso.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/867a5abdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f8be256efc50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f87a21cea66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8fa28389b2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/tera_rmhm_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8062/3276/files/83254224645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1019/5107/files/mubonipozijug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5949b3-d19f-4262-a8a4-84abd4249e17/santa_marta_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32b8001-9484-4817-8544-00464c82bd26/11564508740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c52e8d-df00-4f24-80b6-701c50e47f19/95867895657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00a122d-3c89-43e1-8e9d-c019cebbc6b4/22789615665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40db5980-6f03-4b63-a276-1fcde95444bf/vufedogeledakuladarapavuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fc3ed4-a7be-4492-a877-088eb9fa2199/C3A9valuation_passC3A9_composC3A9_6C3A8me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ff28bf-be0f-4924-8900-2af5c96b0c84/vonixugizufokiwoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cf5077-e033-4422-a491-eea7b35773ff/56698322273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcff5eee-ce7f-48ae-9622-bb0d4192105a/49635980245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c165f85-1810-4946-b68e-41c890404dbc/froggy_gets_dressed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/rupert_neve_rndi_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/forumias_prelims_test_series_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3413/9546/files/nursies_when_the_sun_shines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/molepibizikuse.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B3 5116 bytes
SHA-256: 8bb24b3729f590e6845daeda7ccaf3ed6fd55fee0a97ed5a9f71173da75a52a5
font_01_sfnt_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 11696 bytes
SHA-256: 345ad122919b2f7f68db91970875191e64897ad82b87d3cb4bb99d1a1bbf026b

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