Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aab5ebb297cb01…

MALICIOUS

PDF

43.3 KB Created: 2020-10-11 19:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 6b9a85bdac89b4b34bba63f8753d8f6e SHA-1: a2266f4c6760d3a4ad38b2d6b096eb7c130bb458 SHA-256: c8aab5ebb297cb01d479f53cbd349bcffe7bd50e313d1f56cbfe314e08cfa6b7
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.com/pify?keyword=botw+twin+memories+shee+vaneer+shrine In PDF document text
    • http://posazige.dimedragons.com/uploads/1/3/1/0/131070152/2014362.pdfIn PDF document text
    • http://files.tacomasbestpiercing.com/uploads/1/3/1/6/131637291/3930128.pdfIn PDF document text
    • http://gadak.drmariannedunn.com/uploads/1/3/1/3/131384013/5288f178f.pdfIn PDF document text
    • http://files.gulfcoasttransgenderalliance.com/uploads/1/3/2/7/132740662/12f06326f.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/45657161110.pdfIn PDF document text
    • https://site-1037189.mozfiles.com/files/1037189/nilulijoxonimutubajoga.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/31304511850.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/sikigur.pdfIn PDF document text
    • https://site-1041598.mozfiles.com/files/1041598/lavexogidabamamejo.pdfIn PDF document text
    • https://site-1039847.mozfiles.com/files/1039847/26556238780.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/59292951029.pdfIn PDF document text
    • https://site-1045328.mozfiles.com/files/1045328/zavotufipurusu.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/1/0434/8212/0358/files/college_preparatory_program_aramco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2483/6764/files/como_hacer_un_barco_de_papel_que_flote_en_el_agua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7667/1895/files/19183648346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2126/0184/files/santa_fe_county_clerk_new_mexico.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_off00006c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9F 5092 bytes
SHA-256: 39278dd0aeadaacd297ccc1590690d343715b819af996fad1c19c0e8fcea86a2
font_01_sfnt_off00007dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD2 10072 bytes
SHA-256: b31c1281ec56bd1dc962bc667e9a704abcce510106685ccaefabc961dc9e95ad

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