Malicious PDF — malware analysis report

Static analysis result for SHA-256 e478eaab7e3501a4…

MALICIOUS

PDF

74.5 KB Created: 2021-03-03 04:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 140e59e03afe0a11c8c1ffe0ea2794f2 SHA-1: da59d80c86c97c3af0b7f86727a08f36a48d56ad SHA-256: e478eaab7e3501a4c29c4ea30271819d7bdce4a5a78848ba9d192e49327bff1b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-severity heuristic firing indicating an SEO redirector link used for phishing, specifically luring users with a 'free-download' pretext. The embedded URL 'https://jottigo.ru/wix?keyword=red+ball+pool' is the primary IOC. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to lead users to a malicious site, likely for credential theft or further malware delivery.

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://jottigo.ru/wix?keyword=red+ball+pool PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369794/normal_60029643f2aad.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/king_lear_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_60010be73142b.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/54722334330.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/elements_of_a_film_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5ff5564733ed3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_6037ff52be95e.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/zoxezorafujazuwet.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/latosar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_6030d95ee19d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375357/normal_5ff9f143109ec.pdfIn PDF document text
    • http://fukikenikiru.22web.org/32657611533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_601e4de400ddf.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/free_digital_marketing_plan_template_word.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fcd44f521882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_6009f15eadce3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/11110899244.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/subnautica_time_capsule_locations_map.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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 4824 bytes
SHA-256: 2287ebf8a45f2b9eb44b19c92e5fdd05c08d6d733a127cb11d3a52bd4469e7b0
font_01_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 10032 bytes
SHA-256: 74f847027e883a513ed5f7617f8de15edfe84d0daea02d289d7979bd4df457f6

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