Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47457330bfbe9e2…

MALICIOUS

PDF

40.9 KB Created: 2020-11-09 07:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: bdad7e22633607001b66fcd85ca1f97f SHA-1: 328d61a27a8b991c40bfc4d32cb7ad706a7b9ff5 SHA-256: f47457330bfbe9e2c725c466b0779cee9c52d0897190c9f5e7d6cead2cd8057b
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://trafficel.ru/123?keyword=download+terrarium+tv+pc PDF link annotation
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/5769266.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/pelaleji-mitideninu-tesaxafo.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/zuguridimon.pdfIn PDF document text
    • https://lojawosexofiv.weebly.com/uploads/1/3/4/6/134636472/badaduzupakis-sadumujo.pdfIn PDF document text
    • https://vadulovoke.weebly.com/uploads/1/3/4/3/134338980/zedeluto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f9ff43328a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f87af9a3db9b.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/8980347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_5f987f2b9aa53.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/wonoti/cast_fossil_image.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/owners_manual_for_husqvarna_lc221ah.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/8180319525.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/21391622246.pdfIn PDF document text
    • https://javevunugibu.files.wordpress.com/2020/11/castle_in_the_sky_orchestra_sheet_music.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_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 5192 bytes
SHA-256: 482ef7d8ae7f8780db64fa51a243f050573de7d0c731d5d9564d94ada4a2e502
font_01_sfnt_off000073e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 10304 bytes
SHA-256: 531ae1575d3944b22289af897ab605d1a4c54930cc6199f5aa432ca6837b3c28