Malicious PDF — malware analysis report

Static analysis result for SHA-256 5136b25526409ed9…

MALICIOUS

PDF

46.4 KB Created: 2020-11-04 14:57:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 321ad709e2f8bbdbffb3acdc48ca60b6 SHA-1: 892fe76970d9c0213de642f98a23eb7a5581702d SHA-256: 5136b25526409ed9a9a849261389da9234818791dcfd7a1e3fd502b77037cf8e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=inuyasha+x+shippo+fanfiction In PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/584239.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/78ab8e1ba.pdfIn PDF document text
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/lutelubizaravivomal.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/d4e65706e9f.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/kakef/confirmation_receipt_for_payment_made.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/nuxavenozimebuvawutudo.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/96122947983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3abfeea-b11e-488f-afc2-89b2ad48e9eb/bramblestar_s_storm.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/programming_spectrum_remote_ur5u-8780l-bhc.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/85937909185.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/vizio_32_d_series_smart_tv_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b10617c-57d0-437b-a6d1-58e545826024/the_burn_journals.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_off00007672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 5084 bytes
SHA-256: beb7327f45703bc59ea00b815f1d331d67da8282e2e5ce952526c71ad79054c7
font_01_sfnt_off000087d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D5 11276 bytes
SHA-256: e925164b3e82c75f3ede1a2bf60d5d3188cac1bac8c36b12baba2b81fd34921c