Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb36036224eb3fd…

MALICIOUS

PDF

66.8 KB Created: 2020-11-19 22:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cefb18d8eead630a23befe8a53328e2d SHA-1: 7e59a327d461237ae29f18ee478fff8335158250 SHA-256: 6fb36036224eb3fd1a31bcdd4693b488539eda281efc2929c99168077580b198
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://traffmen.ru/aws?utm_term=adventure+story+2+game+apk In PDF document text
    • https://mufanebix.weebly.com/uploads/1/3/4/3/134349193/8727571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fa1bd1468a6b.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/zogejatuzawelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_5fa5b13427d62.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/81fc7.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/dinisemowoge/sb2_to_exe_converter_online.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/celebrate_recovery_testimony_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/56436878306.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/89011041522.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/brimonidine_dosage_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/56777829923.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/star_stable_codes_2020_star_coins_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/anomalias_congenitas_y_diagnostico_prenatal.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/prtg_manual_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/5308400105.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_off0000c8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A1 5592 bytes
SHA-256: d0138f97711c6ccfad15b2e216a5a1779d1643d84c1e5c5aacba36a7399ce6f7
font_01_sfnt_off0000dbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAE 10236 bytes
SHA-256: 158758292fd40b9b25fe022f1082748187241c85ab7fe9551e557b298dce3d52

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