Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b25da032ef6d51…

MALICIOUS

PDF

44.6 KB Created: 2020-10-16 00:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e44071f69c9bac28749668884b6af400 SHA-1: b67f16faca74771956ddcda61b3e156ab264327c SHA-256: 16b25da032ef6d51e0b63e400997d9d498ee52203c3a4fb7cf2b84c005296ace
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=prisoners+of+geography+pdf+download+free In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/48e20ec4d1359c.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/6662357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f86f8c3b62e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f86ff89b855f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88ba7219f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f87796d011c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87047c1f671.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bubifapakorubera.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/1902f26163.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/3989030.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/48afb0ac.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/giwir.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/ac7a055ad1.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/5327999.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/ec13ee49-553a-4a72-8651-93e2b84ab0cf/befirugoviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16cf9c8-6485-4586-98b9-ca1a0579bf3b/tijarorobonodezis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0896005-255c-423b-b3a9-635a192dd681/54817911032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2254/4807/files/jexixukugabupenad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8821/4699/files/13625343044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/tulirekelezofuxaxidomugir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/39827237732.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_off00006e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3A 5496 bytes
SHA-256: 11445edffdca3012ce7d12ba35a9f445070afea8781a09d8db18367670b8533c
font_01_sfnt_off000080f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 10508 bytes
SHA-256: 51abedfdea04f86588ffbd9ea8a89bc24b18f17e34daa4dd7ca8b0185648c269

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