Malicious PDF — malware analysis report

Static analysis result for SHA-256 564fa1f4960af243…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 10:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 00d42af6179f337adf7b35863af1d14a SHA-1: dd5cbe26ef0a151f8fd2f1778a0a948046aeef2e SHA-256: 564fa1f4960af243df3c65c95aa416f3aff3b75d2ae2dd3484937a3d420ce430
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=are+tappan+stoves+good PDF link annotation
    • http://zitugaxusi.mygamesonline.org/12008947244.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/sazasalesidomagipe.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/what_payment_due_date_means.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/333298.pdfIn PDF document text
    • https://tibuvaji.weebly.com/uploads/1/3/4/7/134720571/pijetinisavex-rojogop-petudajoro.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/epiaWKY/wood_christmas_cutouts_yard.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/kevezigasipet.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/90884.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/c958de6126e28.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/hhLfijI/jezovexa.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/hgYKjbX/jufalalurubixiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428335/normal_5fcb60748e305.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/favove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5fcff565883bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_600e7cffa57f9.pdfIn PDF document text
    • https://cdn.sqhk.co/besawevij/hhiagkg/pubg_mobile_metro_royale_update_size.pdfIn PDF document text
    • https://sukesiguwote.weebly.com/uploads/1/3/4/1/134132294/nozago_fujewigelanu.pdfIn PDF document text
    • https://kitijudaxedefex.weebly.com/uploads/1/3/5/3/135350735/zabesofirupo_bidofifapa_jonozamexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 5144 bytes
SHA-256: 2a6fb88cb5bdb68892df374ea19a18ac2c2f85145462ff549d8a8559724f8c7f
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 10880 bytes
SHA-256: 264e38adfb27c9eee09efbe0c9cd4adb512e737cd6bece9d4feea0af238f8734

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