Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c69152ad55bc00…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 03:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 40985dafb5fad9b3a054b870b89d0193 SHA-1: 3ec1355dc7b12a360c23e30b698aae115f6371c7 SHA-256: b9c69152ad55bc0085f0209656dc7014c5a9f211936184ec9b381f0d50463c12
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffe.ru/aws?keyword=club+penguin+mission+3 PDF link annotation
    • https://muzaromiv.weebly.com/uploads/1/3/4/3/134380281/a747808a22f.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/voverorasasurodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fa11d4c111cb.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/pikus-tuwetal-voruvereb.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/e9ac9bbd8ee.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/dozerozukig.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/9042864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dalava/53254482317.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/fixorunoxavivimutamodi.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/active_learning_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jefofavelagulosa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 4960 bytes
SHA-256: dd158a7689009f6ae2e8a5bbd8dc6d4c44c8b3a42f757b4149043e739d388f98
font_01_sfnt_off00006e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 9948 bytes
SHA-256: 52267c5885995ce3d1ed17e4a1b74c8bee47d15c2c0a1b5b247f2f9bcdf70514
font_02_sfnt_off00009076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9076 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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