Malicious PDF — malware analysis report

Static analysis result for SHA-256 33be47d537576230…

MALICIOUS

PDF

74.0 KB Created: 2021-01-06 15:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0f3bf41f9b492d02d7a288c922eb65c0 SHA-1: 5c087343af758516b68f0e6a80bd2ddf8711c4e2 SHA-256: 33be47d537576230e00aa75ebc1e7a11c7c048d793e224c69b5f9a0d35ab3369
196 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
  • 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.
  • 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://trafffi.ru/wb?keyword=protect%20the%20king%20chess%20movie PDF link annotation
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/9d20cf.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/b638bf4c.pdfIn PDF document text
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/1203390.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/tokatefozude/chunks_full_movie_cinemavilla.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/11920239347.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/78023635362.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/amazon_kindle_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5dd369d-85f2-4187-bb8b-bb26d1ed7db5/miami_hurricanes_2019_schedule_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e168ed-2b1d-4a67-a994-d7b785469be7/han_seoul_oh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ced948-8203-4394-8c8d-a4b252da29ad/89939999809.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/nevuvime.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/st_james_lutheran_church_in_gettysburg_pa.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/73206331148.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/free_resume_templates_microsoft_word_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ee0c36-9f02-4ff4-a173-38fff439c511/uworld_nclex_question_bank.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_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 5096 bytes
SHA-256: 9a2f757dadc0e72709918f1cd680a6e9d51bd72520f886610342f69b6b6d13f1
font_01_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 11124 bytes
SHA-256: 66bd2866ce341a575e1e2e953f6a6f0809fe54c6f044d1e3a4128d36c9cb7948

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