Malicious PDF — malware analysis report

Static analysis result for SHA-256 313e0ebaefa443bd…

MALICIOUS

PDF

45.4 KB Created: 2020-10-13 17:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 831974ad23af4abc8d7456d44625f730 SHA-1: ba1afba59885792b95da5deb94bdc864acff80c9 SHA-256: 313e0ebaefa443bd5ee1750a09d8e8a87ff7b84f78b200724eaf093f2659ab7d
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://ggtraff.ru/strik?keyword=cabin+fever+2020+movie+parents+guide In PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/37578547715.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/41221677267.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/gafadexugudexaroda.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/dibaredebebinejime.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.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/1/0499/5963/3064/files/2040008911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0797/7889/files/dbt_nightmare_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3938/6531/files/stove_top_percolator_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/69655078633.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_off00007152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 5708 bytes
SHA-256: 7d042d036f427fb261ec74a7f7074a08c04dd004359dfce2f3037edd6535d2dc
font_01_sfnt_off000084ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AC 10568 bytes
SHA-256: b7e484ab3ff00c491711c156a01f766051c52a1a8a8e6be81ca294e94a9c5e16