Malicious PDF — malware analysis report

Static analysis result for SHA-256 461c716dce0bb26a…

MALICIOUS

PDF

68.1 KB Created: 2021-03-03 21:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 051bcfef5e0155eb838136f8f36e32c7 SHA-1: b58c35bb891726a961469bf16c3c3242a9719f4b SHA-256: 461c716dce0bb26a2c3a8ef3253db32fd50228b7715642550491a4b561f97796
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous external links, many hosted on disposable domains, and one URL specifically uses a search term ('black and decker hand vacuum not working') to appear as a legitimate search result, likely to trick users into clicking. The PDF structure and embedded links suggest it's designed to redirect users to malicious websites for phishing or malware distribution.

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://vilenefex.ru/aws?utm_term=black+and+decker+hand+vacuum+not+working PDF link annotation
    • http://oyuncuxx.com/duvimawudepebinobinubitmajyg.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/dafukefadesezite.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/jilupuzowaroxijusax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_601820cf8a8ce.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/midoxizewa_kegiwifugatude_vixiga_wixejujepisowil.pdfIn PDF document text
    • http://flowerport.shop/how_to_study_for_nclex_rn_after_failingj1lxy.pdfIn PDF document text
    • https://dutulizat.weebly.com/uploads/1/3/1/4/131436991/2688405.pdfIn PDF document text
    • https://jiwenetitorod.weebly.com/uploads/1/3/5/3/135325203/8169061.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/wugojutolas_lifubuvibawotum_kinugutarimum.pdfIn PDF document text
    • http://webdefilmizle.com/pebefavscrr.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/6021944815.pdfIn PDF document text
    • http://sexedate69.site/24470602087wqnem.pdfIn PDF document text
    • http://shop-you.xyz/vopoxust0sxy.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/romulos.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
    • https://s3.amazonaws.com/lazolu/79052294079.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/fapew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B2 5324 bytes
SHA-256: 7c34e7f9d20375d82f224403312679994fe6f391f28a5a772387165064e41be5
font_01_sfnt_off0000d2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 9972 bytes
SHA-256: 882834d25fe47c1a11d9c2c6ec5ca9b87079f992364a005f8309b96dc0d71c75
font_02_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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