Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c41011c4583427…

MALICIOUS

PDF

73.7 KB Created: 2020-11-10 04:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cb2d14748784bacc92ff6832da14b6bf SHA-1: 3537975dbbe638a306dc666f55b98c37ace71252 SHA-256: 13c41011c4583427e482e9f6ecbd0121f8caf850bc80e8013fe0a25ad84bbb68
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that redirects to a suspicious domain, likely to lure users into downloading malicious content or providing sensitive information. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attack.

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://traffset.ru/123?keyword=biomass+definition+energy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f9b6ba48b9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f8ebdc0d6158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_5fa859303d48c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8a17727311b.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/fasanag/calendario_semanal_2018_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/j_kenner_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/fuzojapemufane.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/guitar_lessons_for_kids_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/joy_ride_cast_members.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sovesivedapatusutelowasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930c6d99-fe0f-4580-a4de-82444f93080e/pes_2013_pc_download_completo_portugues_crackeado_the_pirate.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/calendrio_outubro_2019_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf72d900-88c8-47a0-bdb1-67061839b47a/52061543471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295443ba-9949-45bd-a6ac-4f0a57b90be3/40385277326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ca3fc4-3a83-4437-8a41-c2f09c77506f/92716227991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1743b3a-79cd-4307-aea8-d1500cacdbaa/crystal_clear_iptv_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/81785948777.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 5348 bytes
SHA-256: 92dbe149c338f1d1ad0f0a68553b22d64eb1b8b8c327ea28296eda97008491d1
font_01_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 10724 bytes
SHA-256: 6aa994f7aa3ec3ea8636bd42a2fe3ec1864840ca4cdf0d6662db25889fd3c571

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