Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5957b0e48d0c0e…

MALICIOUS

PDF

68.0 KB Created: 2020-11-21 10:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 76aefe63dc22898adf0530bbaaada870 SHA-1: 2dd2968e1913a7af645ff38faadaa8851e8b8393 SHA-256: 1f5957b0e48d0c0eba4428a90ea0f2296dcba16c1027743dec17bc2c48852460
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that redirects to a suspicious domain, likely to lure users into downloading malware or providing credentials. The PDF's structure and embedded content suggest it's designed to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=blade+and+soul+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fb85c325e9aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fb01a67b043a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f9f7202218e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f9c57bdbff10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f98d2fa5159d.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/91011dd4-cc18-40b8-8c10-d4d34824701e/jalisodubolifole.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/change_to_word_document_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/skimmer_trigger_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/cinnamon_cereal_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0c6d13-f6c6-4666-9280-017a2f067b9c/financial_accounting_weygandt_test_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a6d879-fb34-40d0-aa17-13844e73ec57/23183472265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d3dce9e-ef20-4333-9c14-53e4955e0828/2948999641.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/19880372178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dabbaa5-14d9-452e-8ad7-04859bd005fb/sagifepov.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_off0000cd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 4944 bytes
SHA-256: 9a1caf30db7f811c6a8a00da808c0e3d0e9b80ed5a1234ca5a64800787e299ea
font_01_sfnt_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 10912 bytes
SHA-256: 497fc0f3d55e16c6596993875bd953f30b53afa82233ccff2c16962215a38f3b

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