Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07d50abb0b874cd…

MALICIOUS

PDF

73.1 KB Created: 2021-02-16 11:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9d3fd9a9c043c33ae927f35529bc5297 SHA-1: 72d143f073e26484b02dd116735a338910d4fc53 SHA-256: c07d50abb0b874cde2eb59f3beed08c7ed7d988545f8e22acdfca3b31c301c41
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wb?keyword=how%20much%20is%20a%20100%20pound%20yellowfin%20tuna%20worth PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5ff1970a11d77.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/ejjHQji/jevijomuwonaxoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fe55c91168e8.pdfIn PDF document text
    • https://rojirewika.weebly.com/uploads/1/3/2/7/132710632/5399827.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/QWjbieY/34176400726.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/OVahepS/zenoxiduk.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/mZjjFje/wind_up_knight_2_unlock_full_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/ekhiHjf/88237972941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_602727eadd7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_600f5ab26286d.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/hjijial/sun_prepaid_promo_october_2020.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/xisemufezanom_ragijivitu_budofatolew_tozelusede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fe1456a8b0a0.pdfIn PDF document text
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/satusunutowip_mofexiwufaras_pimovo_xomop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ginutu/formica_countertop_material.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5744 bytes
SHA-256: 92455dd92db9ada4546887657d9ca7f542bb830f29d68c840d9ce3ecfd2dc011
font_01_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 10612 bytes
SHA-256: 6a6809b3553445ccdd85c2336fb45e037fad74ca900fd0b2e4b7860a0ca6d956

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