Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c03251be44e68a…

MALICIOUS

PDF

75.1 KB Created: 2021-02-26 00:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4b477ee51344e2d0723c64c9b98413b8 SHA-1: b5127be060e3afcb07299018e2ef4cffcbbf653c SHA-256: 18c03251be44e68a0580f1f14ca4729abcffdaf2a6c65c27fc6ef7df131eba76
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=what%2527s+the+difference+between+pokemon+red+blue+and+green PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5fd8441e5f4de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480182/normal_5ffd59b100189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_60285bd3b9883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fc872ba6c2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_602a82b01dd8b.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/what_is_the_setting_of_junie_b_jones_and_the_stupid_smelly_bus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_600095ff668a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_603778a731118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcd4447cd985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_6022d4124c41b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_602fe0517f364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_60381def474e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_600f834145a6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winulesodix.rf.gd/29731592158.pdfIn PDF document text
    • http://wivegetozedogal.epizy.com/begumigamenalorisesizari.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_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 5912 bytes
SHA-256: 51c9c0b68e8dcf5822a98082b461f79649c45243cf179ca70ce1e481aa4c2edb
font_01_sfnt_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 11172 bytes
SHA-256: 863a3c1206cabfc02e2178bfad1011c57ffb5bfe4ff3cab43430b28fc39fa9c0