Malicious PDF — malware analysis report

Static analysis result for SHA-256 f394cfa906ab316b…

MALICIOUS

PDF

47.5 KB Created: 2020-10-01 19:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 831dc313b283631db586d926bb1571c0 SHA-1: ef7d80956ace8ad6c721a034cb6daadc0b11a73d SHA-256: f394cfa906ab316ba02f70ae550a84f3a39413bba7d540a0ec236e1d7e514a00
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://ggtraff.ru/strik?keyword=ejercicios+presente+simple+con+adverbios+de+frecuencia+pdf In PDF document text
    • https://site-1038442.mozfiles.com/files/1038442/zofumosufojexipovij.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/laxijenora.pdfIn PDF document text
    • https://site-1038943.mozfiles.com/files/1038943/loguzofudanewoguzezirelog.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/39123741739.pdfIn PDF document text
    • http://noxabubu.katarzynasawicz.com/uploads/1/3/0/9/130969265/mugij.pdfIn PDF document text
    • http://gokixili.everyhealthything.com/uploads/1/3/0/7/130739732/5967781.pdfIn PDF document text
    • http://ripefuw.cbccroswell.org/uploads/1/3/0/8/130874085/jazifoxaka.pdfIn PDF document text
    • http://files.anna-abraham.com/uploads/1/3/1/0/131070560/8393596d09082.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/99777054-30a8-428a-aa04-4d11e86cf1cf/22013179998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0a49c9-9acb-46bd-b7ff-fc83f43713bd/sixofunupekapod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e07db3-2ad6-46f8-b315-d78e01dea929/32125756145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47692590-10b6-4cfb-bb0d-70a6c1d9de9e/rukegafidog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/21096657360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/recaro_manual_young_sport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3262/8376/files/36775031242.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E72 5416 bytes
SHA-256: e9343d906291729c1e9b4341a76693cf9464557abe519ccda0ec2a85518bc609
font_01_sfnt_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 15812 bytes
SHA-256: 3f7678c232176368c7a7ca8ec75193213044203622f3138f5d19235aad9b2060
font_02_sfnt_off0000a007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA007 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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