Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed88eda16726181…

MALICIOUS

PDF

69.7 KB Created: 2021-03-01 08:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc39170a9e7ed54733f2e84624deda2d SHA-1: 07836e19f65807a9e7f3f0b3aa1f63b3f318df9f SHA-256: 2ed88eda1672618179fb8a65e27e24811c691d9ff53bd5a00624e708f51eee8e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body's title, 'How to get shadow ollie without it running away', is a lure to encourage interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=how+to+get+shadow+ollie+without+it+running+away PDF link annotation
    • http://bidizujimon.getenjoyment.net/cisco_networking_all-in-one_for_dummies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464319/normal_5ff12f0b0b9b3.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/cuisinart_custom_14_cup_food_processor_parts.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/how_the_grinch_stole_christmas_auf_deutsch.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/71807197255.pdfIn PDF document text
    • http://weroserigo.22web.org/fuxurowuku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5ffeccba1ab3c.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/nespresso_vertuo_next_user_manual.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/pageru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_6012374370790.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dudoluv.rf.gd/14460135222.pdfIn PDF document text
    • http://marobow.epizy.com/cerrone_album_free.pdfIn PDF document text
    • http://luwegovufa.epizy.com/62058049944.pdfIn PDF document text
    • http://datupawop.epizy.com/html_and_css_books_for_beginners.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/76365160056.pdfIn PDF document text
    • http://pisumapopub.rf.gd/93843389574.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_off0000d541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD541 5240 bytes
SHA-256: bf480479c22b55454bfc7251b2ff492d7dcbb4e43b5402c90747bc4833b141e8
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 10088 bytes
SHA-256: 867045cf2283e8d69276875d1693eb2da82534c24d2f2699e8245f335a261179

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