Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dceb58fa940c67…

MALICIOUS

PDF

46.6 KB Created: 2020-11-01 03:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c4df302b53790f7c9d496250c2aa1303 SHA-1: e8773315d83266c4fa7af814d5bb1d727307fce0 SHA-256: 40dceb58fa940c671ca9b8f382439adb164ac4d902d816b1281a188194fc871d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/123?keyword=n7+fury+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8b092f941d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f95c49706a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f9c5a7ad5684.pdfIn PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/vasapejaduzas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f9913c0ebf02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f8dd8b02abd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5f9ce6e7c0bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f94b23810d24.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/1ee137f145b231.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/499744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f9dad8ef199c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6663/5462/files/fupukajeduxukajudolizina.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/leon_dufour_dictionary_of_biblical_theology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/framed_perspective_vol._1.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/81304728525.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_off0000784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 4808 bytes
SHA-256: 0529c4c070ee5943b5bbc45cedc1c07e1d1cd73697ca1f4dda7f190679c0d9b4
font_01_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 10920 bytes
SHA-256: 13d80347be1e26fa870e5f42c3ae5426800ceddfba33a43140d4b56867f062ea