Malicious PDF — malware analysis report

Static analysis result for SHA-256 a591b92d0dcff3ea…

MALICIOUS

PDF

42.7 KB Created: 2020-10-15 05:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 656a52f9acb4c31e989f6ae82cccdac9 SHA-1: 754d5277ae33c8899b00a25500fa173fd9c22bbb SHA-256: a591b92d0dcff3ea6f9329dc04842468ebb7b03a469e7591852f21fc51a05b6f
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.link/pify?keyword=iso+10013+pdf+2020 In PDF document text
    • https://site-1038468.mozfiles.com/files/1038468/jixatemot.pdfIn PDF document text
    • https://site-1039922.mozfiles.com/files/1039922/4363911298.pdfIn PDF document text
    • https://site-1038990.mozfiles.com/files/1038990/71380810796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f87acdc688de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8736de5c633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f874c362c0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8758fd9be14.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/kowuzafisitazolux.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/suvivuvif.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/f697353.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/1/0431/2639/0946/files/fizenadifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2281/0777/files/moxuvolilaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8550/5727/files/97509751713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0041/3346/files/bellsouth_1008_walkie_talkies_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8993/5518/files/what_is_a_jump_cut_in_screenplay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/hearthstone_decks_dragon_mage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7398/8518/files/integrate_cos5_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0243/6245/files/75133886402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0830/8901/files/14726358030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9598/0709/files/96093008407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1347/4984/files/rogigunapip.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_off00006917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 5124 bytes
SHA-256: 3f408808aae7c4a1cceb403691bd0455a203499c0d375bca0ad5fe29f1c93d21
font_01_sfnt_off00007a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 10136 bytes
SHA-256: a2aa90c7f5fb3cf36b42d86919f983460ba40e1d92bdcc86824173f897f6b8d6