Malicious PDF — malware analysis report

Static analysis result for SHA-256 d173b4decf5faf07…

MALICIOUS

PDF

40.5 KB Created: 2020-10-30 03:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cae2e01efd9e80a90c625522cfb94f42 SHA-1: 95c938ef414affdc9f013b843329b1b7474bde99 SHA-256: d173b4decf5faf075ada8b2fe1a89db8574696af50df26d0064f438079ff93b1
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://gettraff.ru/aws?keyword=dragon+deck+hearthstone+2020 In PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/413975e233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9b53fa3cc37.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/2566330.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/425578.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2475735.pdfIn PDF document text
    • https://mebogizudoredo.weebly.com/uploads/1/3/4/4/134472702/6610008.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zetare/gisop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2417/8072/files/dreamweaver_cc_2020_tutorial_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7757/5855/files/gugewasegoxitimulonuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9795/4743/files/c_g_mi_trn_android_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6352/4519/files/14026600138.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_off00005ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDC 5508 bytes
SHA-256: 374021c37c30e5887d4ca43512faf47b317f671231f44fcade1138ce2241bbc3
font_01_sfnt_off00007094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 11040 bytes
SHA-256: d1801917b02aa1d0433763a51e97e9eb4a6e6e6252155f52b68e54f49516bb9b