Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca03a62affe4ea1e…

MALICIOUS

PDF

103.6 KB Created: 2021-01-08 10:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c90c3c6ceec25d69986fccf413ea8f9e SHA-1: 65328506946ab8171994aabb5b60338d3e20fec0 SHA-256: ca03a62affe4ea1e40dd68e9aee25fc7637bc37c64f970a0e86496dcc9270647
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many of which point to SEO-optimized redirectors and potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=conqueror%2527+s+blade+shortsword+guide PDF link annotation
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/mexesanijavodu.pdfIn PDF document text
    • https://sabexezoguge.weebly.com/uploads/1/3/1/4/131483217/zizunelirewaki-fimelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5fc4ef4e84d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f95acf9c3905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_5fc3133968ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f8a7bf694077.pdfIn PDF document text
    • https://vovezakiw.weebly.com/uploads/1/3/4/5/134523709/308c7fcb9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5f98ad2c4c92f.pdfIn PDF document text
    • https://jufozovujibozom.weebly.com/uploads/1/3/4/3/134360308/sakapag-dawutibigit-mimipitotij-ruworedabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_5fbd8e70cee54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5fbc65b478260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a1dea1-e9e6-486c-a2eb-a14ffaeff73f/honda_fourtrax_300_4x4_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f0d53a-1bf2-4507-a103-db36536d6fbe/century_welder_117-052_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577c7366-1986-496b-9626-09ddf1725b78/23085011345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66dded52-0c4b-46f9-bf20-e1855a136b8d/46922128123.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_off0001599b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599B 5384 bytes
SHA-256: 38293e219964ccc44b75305e9c427b1b17ca952fccd462d57b97654e5724cb7e
font_01_sfnt_off00016bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BED 10944 bytes
SHA-256: 9caebc14db41c85d3dbb5f51d90c702316a082141f32be8f70f430ef2b5d18aa

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