Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ecba18207f49f2…

MALICIOUS

PDF

39.7 KB Created: 2020-11-06 15:13:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 984061c23e918e8c89b2be4a3c60fc18 SHA-1: d882ab4207f33b2a6401edd01870c1bfaa0cb027 SHA-256: 28ecba18207f49f243802d47516d0c347123eaa8c7d59b49e05aa7d9fc0ecb1c
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://traffking.ru/123?keyword=brother+vx+1120+sewing+machine+manual+free In PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/zabigosu.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/c75b2532f.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/supidoputesewitato.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/jerow.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/nelazulob.pdfIn PDF document text
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/ramadununenef.pdfIn PDF document text
    • https://dokosoberodato.weebly.com/uploads/1/3/4/5/134597138/wasujekarodofu.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/8c4d5430.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/felasorarabipis/sozaruxagiriwipajarewufas.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/how_to_wait_in_skyrim_vr.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/abrasive_jet_machining_project_report.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_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 5888 bytes
SHA-256: 17495f07b4ae232231f6fa7100d833374c930ea0562af043936f6184972e3ff7
font_01_sfnt_off00007148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7148 9696 bytes
SHA-256: 05d9d4b3d2f4a340727d4e2ae4044961c79fab942779428648be977a4902ea28

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