Malicious PDF — malware analysis report

Static analysis result for SHA-256 59acfb8b199f8d62…

MALICIOUS

PDF

43.5 KB Created: 2020-10-07 14:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da208cc079e50651d08978054f407132 SHA-1: d6a3439ffd00ba7119610de29d6520b0fec11663 SHA-256: 59acfb8b199f8d624ecfe41b42cb53be87f8325e19573e392182af09512990c8
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/pify?keyword=lesson+before+dying+pdf+free In PDF document text
    • https://site-1044053.mozfiles.com/files/1044053/71929137567.pdfIn PDF document text
    • https://site-1039533.mozfiles.com/files/1039533/27208317064.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/93446247310.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/woperuxu.pdfIn PDF document text
    • http://bozaju.naturesjewelsak.com/uploads/1/3/0/8/130814340/kibosuxipufe_sofuwewabopop_rememela_zubasa.pdfIn PDF document text
    • http://files.harttravelguides.com/uploads/1/3/1/0/131071137/xubepimakigi-jesusuz.pdfIn PDF document text
    • http://files.westcoastfootgolfclub.com/uploads/1/3/0/9/130968962/vivukajik_baremivodogub_gumawupu_pogufato.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/1/0438/2654/4802/files/xopojewuwawuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1167/2733/files/tarjetas_de_san_valentin_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/potter_county_warrants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0236/4579/files/hour_and_a_half_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/jinaxemota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0018/8061/files/32372278265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9692/3030/files/girl_scout_weenie_man_song.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_off00006da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5152 bytes
SHA-256: 6a7fd680a0b00ceb6e815396458bbcc3059c3597f0f2d49d939d3039841e744a
font_01_sfnt_off00007f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F44 10008 bytes
SHA-256: 76d4d1416342a1abcdb13cb1a1b8cfbfebc4dc929f5e376981e7cf6e8b436ed0

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