Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ef9807d801031c…

MALICIOUS

PDF

50.6 KB Created: 2020-11-01 01:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 02b2f79eb188bbfd573eb2a8d8b5d655 SHA-1: bf061871a3e61a5451e424f94dcfa8bcc9e2fdf6 SHA-256: b7ef9807d801031cac10238546dca0281b7a15f3b05da77230edc8dfdf2dc424
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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/aws?keyword=mario+party+7+boards In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f941c38472d1.pdfIn PDF document text
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/tutuxenita_marowopa.pdfIn PDF document text
    • https://ripilebaxozeduv.weebly.com/uploads/1/3/4/2/134266308/7188607.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00006f25.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00006f25.bin)
    • http://www.daltonmaag.com/In extracted file (font_04_sfnt_off0000aee6.bin)
    • https://s3.amazonaws.com/gifojuxaxeva/ejercicios_de_ingles_present_perfect_just_already_yet.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/46813209983.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/17642136688.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/januto.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/tawijedupojobevatut.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/cours_amplificateur_diffrentiel.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/96689259386.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/beduratemitezik.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/corner_bookcase_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69ae02a-67af-4749-a441-31bd4dc391ce/problem_reading_game_content_destiny.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 extracted file (font_01_sfnt_off00006f25.bin)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 3892 bytes
SHA-256: ec41c77d42e76f48824eec2835760ef8059bab213711ad0c8c595e30de7844e1
font_01_sfnt_off00006f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F25 4812 bytes
SHA-256: 9326910c59f75c57383608a337be0378560417e83eb90502ab6ce9ac0def7016
font_02_sfnt_off00007f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 2216 bytes
SHA-256: c91ba3a5cc5288c2bc56175689bc23b760469d7befe9e91be17e92f2ed58817d
font_03_sfnt_off000089d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D8 10804 bytes
SHA-256: 09b06585ec67a5ee8d4546c51bdcbf92e329d0b58ac2f9e819db63ae16d548bd
font_04_sfnt_off0000aee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3