Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d46ac89944e6402…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 01:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2e78b6b362340e93ff3347067ed7cd17 SHA-1: 284814f39e36126fbe0f85433ec0dec320d0f344 SHA-256: 7d46ac89944e640218207a1f4ffe29164a5b38cfc9f1a0782f52a74e5b36106b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that functions as an SEO redirector, likely intended to trick users into downloading a payload by disguising it as a free book download. No scripts were extracted, but the presence of a redirector URL and the phishing lure strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=systems+engineering+and+analysis+fifth+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5ff83c549bb9b.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/mimusipanafamoxitularebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5fe0ad903e84f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6010a8c935ac8.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/atBJlh3/talking_ginger_2_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5ff656120d668.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/gjfL4FS/derwent_watercolor_pan_set.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5fdfb2e46f428.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/8268937.pdfIn PDF document text
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/mozaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_603cc26631987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_604aa18aa8db6.pdfIn PDF document text
    • http://sirunome.mypressonline.com/wuvoramovoj.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/18361919846.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/aqua_magic_rv_toilet_removal.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/Rghdgge/rasuzegasanubofipod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_1d55516466e44e4eac9d796a6738a61e.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_12804f82caf849d085bb54caf4519b76.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_3d8e2363ff7e44bc8648a534bb24381e.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_bcee13b7dd05452db80159d577a8e858.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_0c3218863e69478aba37e3d1526f5a9d.pdf?index=trueIn 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_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 5660 bytes
SHA-256: 9940d24f207d1d58ab67727b67f5caef3612c3e88c9c9312d697d3620324c5c2
font_01_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10572 bytes
SHA-256: 6699c76f3dd444b01a0afff8fc1f48315e6652b44e9fd9589eddadcb8e823b09

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