Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8c8f3108abc0ba…

MALICIOUS

PDF

73.9 KB Created: 2021-03-14 13:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cb3e576a7a91cd9c921d24142a7d93a9 SHA-1: d545a9267a863c49e73d6bd3727e06a4c73de85a SHA-256: dc8c8f3108abc0ba94dfd846730df835cde82beac5a3d864d1821b10dece99ef
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-risk heuristic indicating it's a phishing lure using an SEO redirector to a URL that promises a free download. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI point towards a phishing campaign designed to trick users into downloading further malicious content.

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
  • 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://zajinet.ru/wix?keyword=manual+for+spiritual+warfare+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416316/normal_60385db2c9766.pdfIn PDF document text
    • http://detonic-italia.website/kunopupazimaxasapajtm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_60350a1e0c74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_6040e5260003f.pdfIn PDF document text
    • http://vbruti.site/76002941773zjh8s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_603649bd6037a.pdfIn PDF document text
    • http://xteenware.online/are_burger_king_impossible_burgers_healthyzyiao.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/teximikamukubo/12300057964.pdfIn PDF document text
    • http://kepinud.rf.gd/what_country_has_wolf_of_wall_street_on_netflix_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5671edc4-74cd-423b-960a-9a240877c6fa/lotusoxiluvexu.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/jivebuxafokub.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/pesitusakafe.pdfIn PDF document text
    • http://jomewuborova.rf.gd/51324475791.pdfIn PDF document text
    • http://zebivavube.epizy.com/38652004434.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/ib_english_language_and_literature_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438e3f20-f02f-433f-9ddd-83df297e5ec1/5863806604.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/beginners_installation_guide_arch_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c1acf0-fc92-4c2b-979b-7d7047afbe6f/gawaxud.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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5132 bytes
SHA-256: e0d3ae2f5cf81cc60241196aeba344ea4c42b9304fb9018eb6f725dcc4f0851f
font_01_sfnt_off0000f332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF332 10960 bytes
SHA-256: 12729dd0d51dd01edaabaa6cc2898d9a97991f3bf95b73fb185c2b07ac7232ec

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