Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae47f86f7b5f6723…

MALICIOUS

PDF

72.8 KB Created: 2021-03-30 17:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2f2ea48f67924743622d38797b5cfc4a SHA-1: 7a96c750db353f06b2a6ce9577afcf583336a20c SHA-256: ae47f86f7b5f6723664a850ef2ee06572b1b09652e3722cbe86a09a8051af722
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/123?utm_term=kinsey+reporter+app PDF link annotation
    • https://ruponijipatom.weebly.com/uploads/1/3/3/9/133999380/265777.pdfIn PDF document text
    • https://cdn.sqhk.co/rajosibakulu/nejehcz/uppercase_cursive_handwriting_worksheets_free.pdfIn PDF document text
    • http://lafowesezojo.scienceontheweb.net/19768384254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_603f858d6c66b.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/nebarutaruxiruxab.pdfIn PDF document text
    • http://vofufime.mypressonline.com/all_about_me_worksheet_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460678/normal_6024b4e8983f4.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/guess_logos_level_207.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ijiHxoU/qte_kung_fu_masters.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/61319a98-1dab-4e46-b086-e4c508c69e8b/what_is_the_best_celestron_telescope_to_buy.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_51def5c620af447596936e920f425a9c.pdf?index=trueIn PDF document text
    • http://taberadajip.atwebpages.com/kixexiwiwurix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1feef9e-1f0a-4000-af61-659bb06a4d8e/nunimexabipibanakar.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_2b6c49fe949a44a3a871165bd173a9e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da62699-54b4-470f-ad86-1db6a9bc4899/wise_services_lyman_wy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d481e267-21ba-4480-8b25-408733012509/lewajilovorajatalegorojo.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_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 4852 bytes
SHA-256: fc6373e1eeaf17e6c96919dd192940a18c1e20393e0d7a8c830ef8e255c0d244
font_01_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 10540 bytes
SHA-256: d945d4885772d67c4aa98e816d022116062a0693765102aa2ba8f32c6d55c85f

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