Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92c9f48bc7f33e5…

MALICIOUS

PDF

60.2 KB Created: 2020-11-09 17:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f03d70ddedde7ae48e9af5832b74837a SHA-1: debffc04e2cc805b5c1d7efa76f12689e7ef347c SHA-256: d92c9f48bc7f33e56178b798a44b28c87fbe696199d49d62c1e2fd857f5ee5d2
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://trafftec.ru/aws?keyword=illuminated+manuscript+definition+art PDF link annotation
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/7124087.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/lupakemufeden-rujivod-xuponelotisake-bavamedabibiro.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/jepijedeloduw.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/3836618.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://uploads.strikinglycdn.com/files/05196e2b-14b9-4cb1-b0dc-1a407631cd0c/top_dance_country_song_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd42f495-99ad-4b62-8e06-d4d429ad2f0c/1_4_hp_electric_motor_with_speed_control.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/ruxaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f606b0ae-2297-43ab-b266-7e70489288db/sogevogusajuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a00a44c-31d5-445e-8536-1cfc9ca5f20e/tumezufajari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50eaf03d-c47e-4b4b-8b53-788847845c93/37152050151.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_off00009e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1E 5120 bytes
SHA-256: 641d8c712bfa6ecdf645d2890c900bc6b48dcea4fd54e0ae9df8c600410cc474
font_01_sfnt_off0000af63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF63 11788 bytes
SHA-256: 50831e81fecee4dec6e92051a624387a74fe1a9622eb75c98a7553552ba71717
font_02_sfnt_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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