Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5976476d0022737…

MALICIOUS

PDF

77.0 KB Created: 2021-02-16 03:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3646b9972aa9ed75e32ef41c9749de7e SHA-1: 493157d38d6c3e7214f26f9af8357a6a816b13d5 SHA-256: b5976476d0022737cecc24773f8677bb28b8a9810f4545da78f3c21926bed4ee
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=fairy+tales+rosemary+repel+shampoo+and+conditioner PDF link annotation
    • https://cdn.sqhk.co/bizujutenifo/jgigicd/73081768654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5fc8424a0ffff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481168/normal_5ff7b5eed79c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_6028384d94188.pdfIn PDF document text
    • http://forexgeeks.net/islamic_calendar_2018_ukwj663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5ff9cc32aa060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_600b1f2e6b311.pdfIn PDF document text
    • http://ostanni.fun/hobart_beta_mig_250_owners_manualt9ry3.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/iiib8rR/olivia_newton_john_top_ten_hits.pdfIn PDF document text
    • http://my-favshopf.online/carbon_footprint_articlehiv3t.pdfIn PDF document text
    • http://copyright-rules-help.com/ahly_vs_zamalek_channel531ak.pdfIn PDF document text
    • http://tibetterrier.ru/jekimobaxeludegezizub0mea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5fe99c2967058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5fed2707b695d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5fd7df39ac2f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 5160 bytes
SHA-256: bad0ef41cb90c350732eeda125610aba7367ab072783c0171012f0546e726f5c
font_01_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 11380 bytes
SHA-256: 5b50928aa20e266bb6b5a082d74de967e0b370d26efb208d687224d706fb821f
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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