Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa46fdfc443470e…

MALICIOUS

PDF

37.1 KB Created: 2020-10-03 15:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e7d66a19993ab0d5398383b77935a135 SHA-1: ebe4807ca50b6a6be04905e40c7776f98afbdd6a SHA-256: 9fa46fdfc443470e641ef98237883be779fbeee144ab89990f310545dfd57af7
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=jolly+phonics+a+z+pdf In PDF document text
    • http://files.micdropdj.com/uploads/1/3/0/7/130739835/d39276ced896c.pdfIn PDF document text
    • http://files.grace413.com/uploads/1/3/1/1/131163617/beturis.pdfIn PDF document text
    • http://galiwepin.jakob-israel.com/uploads/1/3/0/9/130969963/f2c6dadbfe7.pdfIn PDF document text
    • http://files.mopsatvoyagers.com/uploads/1/3/2/6/132683040/xuzaziwalepup_nesudodul.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/wanozim.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/binowujodojap.pdfIn PDF document text
    • https://site-1038530.mozfiles.com/files/1038530/dukizifolonijoxenadufopa.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/2250264215.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://uploads.strikinglycdn.com/files/7318319b-baa4-4c50-9494-c7dcc68b97bc/lafemumijuvagedife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a77b1fa-61e9-4932-971e-490821729912/63234472663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1227028c-1d6a-4b2e-b262-1c1a0d0f29e3/nulutusadan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/tristar_pictures_logo_2001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3605/2136/files/types_of_sculpture_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9638/5957/files/zatisekemikixewuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/20364228618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8137/4365/files/tedunewenodawovumumufe.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_off000048a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A1 4880 bytes
SHA-256: 69150afbfc66a24cf296b666374202f449bb8a8f1f7ebecd660762574984654f
font_01_sfnt_off0000592b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x592B 9492 bytes
SHA-256: fae844a2f88972ea180f1fc375ebe34c262731012498d24b9f174b4cae8eea11
font_02_sfnt_off000079ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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