Malicious PDF — malware analysis report

Static analysis result for SHA-256 8241237af8f43893…

MALICIOUS

PDF

62.7 KB Created: 2020-12-26 16:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0f9812b39c9642b53c072002fe678001 SHA-1: 54126aa80172c24196f6caf767a53cf42627bdba SHA-256: 8241237af8f438932a89aae638b50651ff17d77d7651cf321b56813d34538939
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/wb?keyword=phoenix%20theatre%20laurel%20park%20movies In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fd378a7a70db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fe41c0c497cd.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/RZK7d5D/past_present_future_tense_words_list.pdfIn PDF document text
    • https://mexepefavofuj.weebly.com/uploads/1/3/4/6/134659137/tibamumega-vegatapilixun-sogojezalupu-lizixibuxovul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fcf14fdd718e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464869/normal_5fe530309df8e.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/TPtOjex/vufudelulunozadozofef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f914d021dbda.pdfIn PDF document text
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/jugazukel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e0aeab-b18c-415a-a1f5-e0dc5c9620d6/21864949538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa9758b-898c-49c0-b16c-e56ae9098cf5/love_nikki_deluge_dragon_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfae7ae-501e-404d-93ac-ebb679a272bb/82821457873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ddb87f-396d-4a48-8c4d-a058109ff5dd/74533736504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b75ef4-a06f-43de-9177-f99cfb6f4e63/sim_card_not_provisioned_mm2_att.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc01d97f-562c-42f9-8b88-1f50171159cb/wunitozoga.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_off0000b910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB910 5252 bytes
SHA-256: 3bf4f992f723eace59eec5052b11ea3e7b9587b477a968e9695fe864bc0e9e32
font_01_sfnt_off0000cac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC9 10356 bytes
SHA-256: 7ddd6be02cd9915a6292006de6a261792cf8d2b24d9cf22c34af77ab99aaf0a8

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