Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f72c42894fdc5e8…

MALICIOUS

PDF

48.0 KB Created: 2020-11-08 02:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c34b89047bec216d22bc0a76b802f617 SHA-1: e3388ab2b835da4750d419d25f740a6cd6f8ae02 SHA-256: 3f72c42894fdc5e8920f4b059fce76d4600741481001832644b9b640b3abbb24
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://traffset.ru/123?keyword=crimson+typhoon+specs PDF link annotation
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/2572676.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/xugarasuwifusavalug.pdfIn PDF document text
    • https://xoludifatak.weebly.com/uploads/1/3/4/4/134477652/ad782d877.pdfIn PDF document text
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/6604632.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/307330.pdfIn PDF document text
    • https://najutumivuzobo.weebly.com/uploads/1/3/4/4/134473994/bf2e670f.pdfIn PDF document text
    • https://nomuxivobuga.weebly.com/uploads/1/3/4/4/134483798/9bb13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luresimosip/fragile_dreams_farewell_ruins_of_the_moon_review.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6afc3f07-de58-4045-8b73-8088f7076d83/suicide_squad_full_movie_free_no_dow.pdfIn PDF document text
    • https://pefukiketez.files.wordpress.com/2020/11/25202755698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7981a95c-78d9-4ada-ae4c-77d114eded14/wowiwenilafuz.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.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_off00006c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 5044 bytes
SHA-256: 7ba93bed6e7ae06d0aae2b98ca23344e095d5697c08b07d7f06ede3bdb1230db
font_01_sfnt_off00007dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC4 4940 bytes
SHA-256: e7893f49a0d17420a5279f5eb28db69a2b3ad568e19e822d768a85de15e536b7
font_02_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 11072 bytes
SHA-256: c36558c21f01e897ce9465d4bf498da211007696e7330c0426efee32804adfc7

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