Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef63e892e68f03be…

MALICIOUS

PDF

53.0 KB Created: 2020-11-08 16:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 08a1b0f9c14fa23efbc23c49dafc91e2 SHA-1: 5174ab1171403c45b3375ca4af98f582a5005d0b SHA-256: ef63e892e68f03be2c74d1b3d21898f081e4105dab148a2b244c55691e0c6ff2
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://trafffe.ru/123?keyword=more+than+anything+lyrics+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5fa3b6c51d961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f9160b4573a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5f97b28ae3cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5f9f9ed5200b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fa34b52620db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f889f8c2afa5.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/vuxuwanu-giwosofib-begemekofegesu.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/pobawu-kekefibobifugu-vorekofewo-xuzuxupedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_5fa474653eef9.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://rigimep.files.wordpress.com/2020/11/26254757341.pdfIn PDF document text
    • https://wukobakuvev.files.wordpress.com/2020/11/84559218753.pdfIn PDF document text
    • https://mipezutaxujo.files.wordpress.com/2020/11/duxefunazuxetinidaxe.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_off000081ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CA 5312 bytes
SHA-256: 7c1f2d7b55a96248bb172f8252b0cd0d25082aa3bfff1de851c34e1d576d83ad
font_01_sfnt_off000093de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93DE 11408 bytes
SHA-256: 31c420d4fce910af9bf9c95059f529eba9056f9e09a99c0c9fcec830f126de05
font_02_sfnt_off0000b91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.