Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbaf83530784068f…

MALICIOUS

PDF

69.0 KB Created: 2021-03-02 23:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34c07d9c366e8b3f0ffaeed96bf2024d SHA-1: bd1bdd863fd4c15996486afe0f1f1bd90b3db2c9 SHA-256: dbaf83530784068fd152af174e8002c009b2109fd5e8016a04870016f61e65e1
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure referencing an 'American revolution internet scavenger hunt answer key' and includes a high-confidence heuristic for a redirector link. This link, 'https://xezojetit.ru/wix?keyword=american+revolution+internet+scavenger+hunt+answer+key', likely leads to a phishing page designed to deceive users. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

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://xezojetit.ru/wix?keyword=american+revolution+internet+scavenger+hunt+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379844/normal_60219b553da39.pdfIn PDF document text
    • http://tomobufefiz.iblogger.org/gazarakozoxixufaf.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/pmlqigq/the_elder_scrolls_legends_deck_building.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/cchiVua/zigzagoon_evolution_galarian.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418557/normal_5ff16eb111449.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jgcggvC/city_boss_tycoon_idle_clicker_games_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_6010a72e34c74.pdfIn PDF document text
    • http://lofokumado.22web.org/correct_address_format_netherlands.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwuvapinemugi.rf.gd/boss_katana_tone_studio_manual.pdfIn PDF document text
    • http://bidilud.rf.gd/alexandria_catlica.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/craftsman_12_inch_wood_lathe_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/pegewefemotenoso.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/jugibonirapigofilez.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/boilerplate_template_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/85846922620.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_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5520 bytes
SHA-256: 4fea87d77285a6e9c3a62a7351a4618b0efb622d89ff566220581371b30ba019
font_01_sfnt_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 10316 bytes
SHA-256: 113947e859069406cda6ca16015cf2e1be16de729742fa485d4f6fba393111d9

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