Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25147d87c7b90d7…

MALICIOUS

PDF

41.5 KB Created: 2020-10-20 16:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 61e561dbc15d5cc9c166bf5663e4c4c6 SHA-1: 7327e0699acdf1ba9bdc823acb6d4db2dafd45af SHA-256: f25147d87c7b90d717f4c8e58445298dd86ef222da950fc33c5d5e26b75364f0
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Weebly. One of the primary links directs to a known malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests a link farm designed to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=place+value+chart+worksheets+2nd+grade In PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/bawagexuzegabisud.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/bagezusurebimu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8e6c7dd89ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8a3d3d03e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f87c7787c911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f8bda36be8ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8be7243b510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8e0deca0f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8704475e41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5f8d45e47405c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f87d9318d140.pdfIn 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/a69952f4-5838-42fd-adcb-6b45a1a60f17/vutagijivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3516daa4-6176-40ae-ba8c-daf6f975a983/bibimirozukazagav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29986e4e-0e30-48e8-95db-aa332c1ac7df/38170383968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67669767-696f-4ca4-b527-cfa117f5517a/nilagewutorubumorazeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88749443-f5c3-44f8-a8ad-14d2b3c64fd6/26754900212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228cf102-1cb0-44e8-9f4d-8a868e4a1769/divigur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bff973d-4611-4775-9457-00af44b17bba/40903409100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3165b46-f413-4f5f-bf4d-5126d56d0220/87976133903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773868d2-819f-4311-924d-810423b33618/75230510839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f655cd-609e-4c9d-9899-ce7b541b291f/dafamaj.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_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 5552 bytes
SHA-256: f711eb504d5e7deb25a44037295fd6447a289d28a32209e902d0d0eccb0e0139
font_01_sfnt_off00007765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 9584 bytes
SHA-256: ff7628571f83d68ceaf850f57f3cdf17320efb14816302af7e7498f2a77403d0

Open this report in the interactive analyzer, or submit your own file for analysis.