Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd4f1e5f5cdda18…

MALICIOUS

PDF

61.6 KB Created: 2020-10-29 11:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 988d51b66a6ea9d8d63dbca0ee9c468f SHA-1: 2fe0c3af34d3c5090e365d7849e8209e4dc438c3 SHA-256: acd4f1e5f5cdda18db24d3641a964ea4e5cc9b43770a3637bc9b29a82dbc5a84
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/aws?keyword=holy+symbol+items+pathfinder In PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/zodepulomopo.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/rixuge_kugodusegatafu.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/wovuduxadite_sukosupiva.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/wawogegasine-wamosizeboxi-jazefomurutozo.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/8364229.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/vukusa/2699426683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8565e07e-b6dc-4c37-a650-280170253875/architect_s_ruler.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nuxizoredutaxivigab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7623/6950/files/99684725191.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/mukigekosav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff64ab36-63c7-4191-873f-c296739b5c01/pitemut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52934936-0d74-4033-b901-5d05f445e7bd/33633117139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4383/3009/files/diabetes_gestacional_fisiopatologa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2775/7216/files/gopevesifujijaruvogepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0467/3187/files/mark_roberts_fairies_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/control_manual_de_plagas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8065/3216/files/entrepreneurship_development_for_mba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33fa2ef-96b1-4a28-9493-c8abbb183301/classics_of_philosophy_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0709/6986/files/monogrammed_irish_linen_napkins.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/dalawapisokawituwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd86e8e0-4682-47f7-8112-34f729ead4d9/pazemu.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_off0000b106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB106 5484 bytes
SHA-256: f4f1685f207e7c6e7d4d755efd52c2eea4d6b67c3aca8714a7b73311cc8a5d95
font_01_sfnt_off0000c380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC380 10412 bytes
SHA-256: d78f547d580646c145c25bddf0a66ee1a13effbb01ce914b3435c38a4ffc2483

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