Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f606abc070ec8f…

MALICIOUS

PDF

40.8 KB Created: 2020-10-02 17:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fc8454ca14c9751482cbfa94cb36090d SHA-1: c7e8225773bb664f2469abb0163a87f0156d7ae4 SHA-256: 58f606abc070ec8fd03ea70327f521f3186d9cdf4521e2780afb619cff1b91a8
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://cctraff.ru/strik?keyword=cbt+for+social+anxiety+disorder+pdf In PDF document text
    • http://files.teaneckgirlssoccer.com/uploads/1/3/2/6/132695990/6583432.pdfIn PDF document text
    • http://manazas.babyfacenelsonjournal.com/uploads/1/3/1/4/131453853/3792260.pdfIn PDF document text
    • http://dowutix.dominadomino.co.uk/uploads/1/3/1/3/131381787/f7fd184779a513.pdfIn PDF document text
    • http://getob.barbaraharbach.com/uploads/1/3/0/7/130739069/6267120.pdfIn PDF document text
    • http://nidozez.andrealapinski.com/uploads/1/3/2/8/132816066/6454583.pdfIn PDF document text
    • http://xitot.thelighthouseinternational.com/uploads/1/3/0/8/130874524/lepudoxak-nokubizifi-votowonimo-wexijeju.pdfIn PDF document text
    • http://files.nvrenstore.com/uploads/1/3/0/9/130968996/giwezag.pdfIn PDF document text
    • http://xakuz.fuajiaamin.com/uploads/1/3/0/7/130775443/suvelazobepopuw-xinataler.pdfIn PDF document text
    • http://files.bestfriendstalent.com/uploads/1/3/1/4/131453449/jezepevenamek.pdfIn PDF document text
    • http://files.idlehourtennis.com/uploads/1/3/1/4/131452803/zoluti_dufizeguz_nadig_pejagi.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/1/0480/4306/5503/files/rowivababonabav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/pawajizimidaxonuriri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/zawixifonewebubamorasurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4116/3934/files/funny_birthday_wishes_for_a_deer_hunter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3836/2786/files/praying_mantis_egg_case_hatching_time.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_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5364 bytes
SHA-256: 58a07c066b1fbd462cbb16225601ba2902364bbd0ebfddf0839436e9e1471b9e
font_01_sfnt_off000073d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 10232 bytes
SHA-256: b4caa782663183501cb6ea98040056ad7a152f2e05c767f8b1defbc5d299a453