Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6ca9e516b3c920…

MALICIOUS

PDF

73.3 KB Created: 2021-02-13 10:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ba7865291d53dd440be903623e67d2fd SHA-1: 12e6cf6bb46c3cb50f2bfd4c4a2c7396a23b29aa SHA-256: 8b6ca9e516b3c9206241d62d87943884d4604a2564c03772b6295c7cde0b7d28
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=candy%20crush%20apk%20unlimited%20lives%20only PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5ff5347ba91e2.pdfIn PDF document text
    • https://najoduvojubowi.weebly.com/uploads/1/3/2/8/132815002/bojola_lolufosonejuteb_nederezosurime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449184/normal_5ff867fd77774.pdfIn PDF document text
    • http://tokio-2020.fun/53943597364daq2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5fff15bfb7e42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384160/normal_5fe56619bbfd3.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/koi_aap_sa_movie_480p.pdfIn PDF document text
    • http://maska-respirator.com/biology_book_in_bengali_version_class_12dxt91.pdfIn PDF document text
    • http://jarizodej.22web.org/sample_answers_for_nursing_interview_questions.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/36247916989.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/xugalitewefow_sefuzovaw.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/lupawufixagojojojal6am4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408352/normal_5fc6a9fe0fe79.pdfIn PDF document text
    • http://autolombardpro.ru/tobitatubavof500x.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/gevicge/61438422545.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/hhhZfOf/22022906369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_601787b1c084e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gokemebazeroxe.epizy.com/expense_voucher_format_doc.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_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 5444 bytes
SHA-256: e3db1024f713ae5321899de3125faa638ffe545b2f51c3fe04e400f6fc63fd48
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 10332 bytes
SHA-256: 7b9cfb702260c1cb34b1be31cab368ab80bc4d043cb549ba7687c6cd33b87d60

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