Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b39ad406998fde…

MALICIOUS

PDF

46.8 KB Created: 2020-11-06 14:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6580bfb4782989812b1f1812382e628a SHA-1: 1445cee82f7770fd319f416a068d90c1a8561c53 SHA-256: 56b39ad406998fde629d4ab4ff27dcd2d5a83aac7c19e2537493733ef59f435d
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://traffset.ru/123?keyword=manny+pacquiao+fight+stream+reddit+buffstream PDF link annotation
    • https://fixuvanexe.weebly.com/uploads/1/3/4/3/134359444/kalafogupep_vujixu_jaxonirope_wukunad.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/gugadukoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fa40c067ce16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87ee876f70e.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/tawujosegonerot.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/21534.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/tosevud/laran.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/acer_axc-603g-uw13_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/mebanaxupuxilep.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/swordsage_handbook_dd_3.5.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE8 5792 bytes
SHA-256: 346b7aa2cbb494cdae348b34228c6e6d8dddaa55db93ce38a8dd9132b930b290
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 11160 bytes
SHA-256: edecdf77343ba1a7362907c7b37975a507714ccd917d4699a453fe8579396f2f
font_02_sfnt_off000089c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C3 16256 bytes
SHA-256: 3fc654e6c44e5b5ea7dd8abc44003e33fd6308e4012022e1519ba6150b39c93b
font_03_sfnt_off00009f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F30 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34