Malicious PDF — malware analysis report

Static analysis result for SHA-256 603e01105100ed3b…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 22:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7b4e30dfb8b8839fafd4a4fdf2c95e57 SHA-1: 62d845bf37b55c6223e78fc4f4019411bc16883d SHA-256: 603e01105100ed3b77755c626c76be6c055c2f145f129b3e481cd52d3537b431
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=unblocked+games+tetris+d In PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/wirinazozow_fodelulum_valefelopo.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/2902415.pdfIn PDF document text
    • http://tertov.xyz/670210570786f1pu.pdfIn PDF document text
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/jijafinuluvabo.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/jesidofefe/destiny_2_forsaken_weapons_guide.pdfIn PDF document text
    • http://gijufemuvo.rf.gd/4961100668.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/manual_workaround_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/esc_dyslipidemia_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/midogezumibag.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/four_features_of_a_spreadsheet_application.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/zebigox.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/kaputatad.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/keto_cycle_diet_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/kenigapalisarapinu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/formatting_spreadsheet_definition.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_off0000db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 5456 bytes
SHA-256: 2ad432e5eb400f2822fc46298cfdf2cf11d6870070ae97339d480ac9ccbf8ea9
font_01_sfnt_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 10076 bytes
SHA-256: 35b9971eb6bd22573e8a451d6d2ab694cc1cfffb8a2f33190b07c73bac989b68

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