Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c12096d5818193…

MALICIOUS

PDF

82.7 KB Created: 2021-02-10 17:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 791b9539aecfc1b4874fc6eced9c3144 SHA-1: 4d82a78ccd55b7b5463d3d536c791fe9ecf32f41 SHA-256: b6c12096d58181939c88243312bf1bb1245353f9a8c27ab216f50201c5dc3672
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=fly%20fishing%20guide%20school%20washington PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5ffdd3a84ffca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_5fd1282d4b87f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384308/normal_6007ecd360436.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/blghp3K/air_traffic_control_tower_hd.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/3183235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fcf12d2e9900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5fc7b8ec59500.pdfIn PDF document text
    • https://cdn.sqhk.co/lunilageruvu/hUHokTU/hearts_of_iron_4_mods_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5ff505d625550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422918/normal_60069bed32722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_5fd1fc92b17d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_5fed470bdb88e.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/sugowubuf/92562169181.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/destiny_child_spa_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/set_theory_venn_diagram_questions_and_answers.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_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 5336 bytes
SHA-256: 297b323cc9b03cf0ed308f8fbad26a6ed62a66dce0d9262db034d467e16ec00c
font_01_sfnt_off0001162d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 11664 bytes
SHA-256: 1b07f2a63217e6c2ac2f8afadc2ec6cf60176e151a06da2c5c286ecd84d1f124

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