Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e4df0cec6b96c3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-25 04:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 25ede9301e72ed120a98666b619a80be SHA-1: 69f546839eab1432dbba942ed6d8a5e01cb6cc99 SHA-256: 66e4df0cec6b96c369f9034a70be4abe8fcbd5f1d86a23fc84537028e5846e06
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.ru/pify?keyword=crystal+reports+totext+no+comma In PDF document text
    • http://jovako.myoptique2020.com/uploads/1/3/2/8/132814930/gegolabobofu.pdfIn PDF document text
    • http://ruxilakar.htateachers.org/uploads/1/3/0/8/130814328/50fa061a5.pdfIn PDF document text
    • http://files.lucypetersonwatkins.com/uploads/1/3/0/7/130775528/2324679.pdfIn PDF document text
    • http://sifudim.positivelypigs.com/uploads/1/3/1/6/131637881/73c67f.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/1/0430/3116/7137/files/miwasujujame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/6993096578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/zumupasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/semifitojamebezojisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/xinulefanuginokibidip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/53746961861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/93733824056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/nevokefutuxazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/janatha_hotel_full_movie_free.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_off00005d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 5156 bytes
SHA-256: 90da8e1325c285d2af772b1c0dc1522b7c135059136bb24f06d0c44c672d689c
font_01_sfnt_off00006ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA0 13264 bytes
SHA-256: 2fde4460599a7d5605d936d7702a4c3bdd8b3b1ae9805e18ecca479c9fdc7e0c