Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01943a276309e9e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 07:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 702268a6e2d242edd8b7a4322c0ca11f SHA-1: b15bf921cf9712af4e6ec9ccbb3b473575ec6d8f SHA-256: e01943a276309e9e0cb2e19e0612e855b6de05054c022f361c2e15c330c0fa15
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that uses an image lure to redirect users to a URL, identified as a free-download phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/award?keyword=baltimore+ravens+2020+schedule+pdf PDF link annotation
    • https://cdn.sqhk.co/tusufawenu/T6gcyNy/wugubudipijibosu.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/d1ichiV/yugioh_immortal_destiny_kartenliste_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470982/normal_6041e2f997224.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/ijfE5AF/50261820452.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/w5Cheji/treasure_hunters_book_1_characters.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_to_connect_backbeat_fit_to_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/zimofuzam/1Tjb7ii/91934878271.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/Ngdjcif/knightfalltm_ar_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/CccgjOg/corded_beard_trimmer_target.pdfIn PDF document text
    • http://lagajakazevo.22web.org/java_for_mac_10._13._6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fe7e2a41069f.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dVHhiMP/kendall_kylie_boots_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_6035575306f66.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/hjTUmZ5/rapukozaxoturopiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezanijumoz.epizy.com/39711237561.pdfIn PDF document text
    • http://zaxuzut.atwebpages.com/bizhub_c454e_service_manual.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_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 5776 bytes
SHA-256: d9eece39e9c0f641e84453ec8d586265049dcfb4111eea84021c3e56f63db138
font_01_sfnt_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 11260 bytes
SHA-256: 428856f3b3627d4a70949c73f53e41816071c0d79ab526049d818ee32d62e920

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