Malicious PDF — malware analysis report

Static analysis result for SHA-256 c189e6b447ffab71…

MALICIOUS

PDF

46.0 KB Created: 2020-08-19 17:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 58767772869724040e9c93774c76f1a0 SHA-1: 2ecfc63a39a5716d77dc4cfdd9bdf08b07a04f88 SHA-256: c189e6b447ffab715a0c2f570c7c3be1356770c27aeee67e085a832668be564e
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=ethyl+chloroformate+boiling+point In PDF document text
    • http://files.brokenlandbook.com/uploads/1/3/0/7/130775085/b2372d4.pdfIn PDF document text
    • http://vumexuru.wellaromanaturals.com/uploads/1/3/1/3/131380550/80be1.pdfIn PDF document text
    • http://files.monroecountykychamber.com/uploads/1/3/1/3/131381799/rolekodagidaj-rapapoxukom.pdfIn PDF document text
    • http://begekadav.intuitivecoachingwithamy.com/uploads/1/3/1/3/131398008/dc5ea242e4959b.pdfIn PDF document text
    • http://gituj.natinelshop.com/uploads/1/3/1/4/131452883/gupadisafigupedigulu.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/1/0431/6659/7288/files/92051578456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/nagemuriluxosaxax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/50035390697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6343/3629/files/akame_ga_kill_manga_mega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/fulovak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6109/9161/files/fijumizukojupokov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/9979546665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/damage_reported_on_carfax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/einstein_field_equations.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_off0000688f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688F 5448 bytes
SHA-256: 981b455caee054e637b723b2fc36d85427ba1e9e8ce7841958adff102f7bce71
font_01_sfnt_off00007b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 14876 bytes
SHA-256: 0fe95dfdc56ef6a0fa663c760466e7037c09a992ee4bbd8b354b3962370c3b71

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