Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a43fca594574d2…

MALICIOUS

PDF

61.0 KB Created: 2020-11-08 16:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 32fb1f3c233a04862c7119274ada1d4a SHA-1: c51c6fac8fa0500dc8f132cdf236989edb65bf5a SHA-256: 89a43fca594574d2a82b0e01fa06bd9453b1af2982b95085cacb26a3e52e2054
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=pokemon+blazing+emerald+download PDF link annotation
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4557862.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/4609989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f90b70166ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f8c0e3664edc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mizeteb/google_photos_sorting.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/pathology_made_ridiculously_simple_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/sunday_blue_laws_2019.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/orchidaceae_family.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/10710705795.pdfIn PDF document text
    • https://basulirezono.files.wordpress.com/2020/11/10580312246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d29de5-6876-4b27-a241-d93062310ea9/sanat_tarihi_terimleri.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/75492599631.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/carminative_drugs.pdfIn PDF document text
    • https://xixunetov.files.wordpress.com/2020/11/redragon_s107_gaming_keyboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8da8e7-4de3-4efc-8dc4-4f06fdfe04a8/3891871460.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F3 5020 bytes
SHA-256: 33f2419315166358b7282b0783f3db0a5d14af45ca41f56ce022e8799cac92c1
font_01_sfnt_off0000b1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F3 11484 bytes
SHA-256: 9fa303dbbf2e179241a747ac5e72b1bd795e41855053edd59001a8abbf340263
font_02_sfnt_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361