Malicious PDF — malware analysis report

Static analysis result for SHA-256 e998b3a5ce7346d3…

MALICIOUS

PDF

46.2 KB Created: 2020-11-09 02:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b32459374f46ba2acd158fa87e2cb737 SHA-1: b4343d5e9b60fb0c73b032bcd456f59202ae66f6 SHA-256: e998b3a5ce7346d38c9e71997d7e5799b6fd97fcd15b4a649861b1d1c1208b5a
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/aws?keyword=portfolio+management+tools+comparison PDF link annotation
    • https://vulagikivup.weebly.com/uploads/1/3/4/2/134234906/fawegu.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/kawavususunajam_wunipokakiv_leleto_baveriwomoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_5fa5f5a16bc5e.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/padadutiseni/derecho_econom_c3_adamo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/luxitokubifajeki.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/wevatawo.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/tiladudiwowunoxosuba.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/fudononoselafifusuno.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/27709064637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e492676d-bf85-4cf1-b51d-f18f5c538f8b/trade_restrictions_in_international_trade.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/52066680487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44cde10-f473-422c-ad22-45736d744ad9/craigslist_cleveland_motorcycles.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_off00006f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 5336 bytes
SHA-256: fe8ccac8ca5214b7b258acf21a4c2cefe5ef65e1b399df82f0e962716499b1cd
font_01_sfnt_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 11808 bytes
SHA-256: bfdbc0999ef2199404115a0cf1984922068cc0fce0628df5ed2e842f7a2501fa