Malicious PDF — malware analysis report

Static analysis result for SHA-256 672f27ef51305519…

MALICIOUS

PDF

51.7 KB Created: 2020-11-05 22:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 59b05030cf481d5883e15873f174b2e7 SHA-1: aa3aa95031408cb1214638a998cdff550d07ea5e SHA-256: 672f27ef51305519b352fbd5fc2d0f3834063defeb2b447d7fb18efe4dd68b09
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://trafficel.ru/123?keyword=the+last+argument+of+kings+pdf PDF link annotation
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/c5d8dbc2ee51.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/592645.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/luzobutebabenax.pdfIn PDF document text
    • https://nowakepofor.weebly.com/uploads/1/3/4/3/134369235/5193854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_5f9246f5ebf52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5fa0d9977da1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008355.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008355.bin)
    • https://s3.amazonaws.com/rawesaragegugar/sodium_sulphate_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ragokokaneximufodomuwesi.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/why_do_they_call_it_kangaroo_island.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/77077599983.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/38897163166.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/planescape_torment_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/hematology_in_clinical_practice_5th_edition.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_00_sfnt_off00008355.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8355 5468 bytes
SHA-256: eacfe64a451815cd077400a71046862290f6e5d0561260d9641a50e638d99070
font_01_sfnt_off000095c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C0 13892 bytes
SHA-256: bde6fe713cf7fce347023da0eaf1bf375342180da9cb6fab60cddb3ec292e0f5