Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ca4f063e1c1b6e…

MALICIOUS

PDF

45.6 KB Created: 2020-10-25 16:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8ef50e72766c51dbea27d31f6502f07d SHA-1: 7298400d2ffc4c97f96bda92cada31e8b3c17755 SHA-256: c5ca4f063e1c1b6e65d4bd80ddb4fcb9a9a2dbf100c894e4aeb8448a4e75bb6c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.me/123?keyword=simple+equation+worksheets+grade+7+pdf In PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/1af1914ad0.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/46c49e1f1c143.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/a0bc8389f.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/mumupage.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/22555.pdfIn PDF document text
    • https://sejabekozifox.weebly.com/uploads/1/3/4/2/134266090/kupalimeluxum.pdfIn PDF document text
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/moneru-wizabawu.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/fimexanabejojo_bowibivejaxipeb_kawuneneverinas.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4d5351fbb209c0.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/24aaa068bc081.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/84a9daf.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/2778091.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/adverb_and_adjective_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/tatakosokuvexobofemorate.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/surah_yasin_quran.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/business_english_grammar_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/risibufuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/dupowibesitepofagijivox.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/employee_performance_evaluation_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/2692033578.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/peter_drucker_management_challenges_for_the_21st_century.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/gimipemegatemanugomulob.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/career_paths_electronics_chomikuj.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_off00006e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5920 bytes
SHA-256: 9d1e83f7de3cdc3afebf338b1b2754227a3c7046a3590e112a030a74e09290d4
font_01_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 11344 bytes
SHA-256: 21e03eedbe862986351c825dd5ce0f8bb44de841f7021ce56dd3fead2a493471

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