Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc30bcf84492bcd2…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 16:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1a8385c5331bdaecf1610513b3e499f2 SHA-1: 090f66dc4dd09b9b7f557f3bc09de6e4c74baa4b SHA-256: dc30bcf84492bcd2734bf34efbff71c7d23773ae377ce3399f83d2e3ec5dbef4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=st+katharine+drexel+school+sioux+falls PDF link annotation
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/fa6b00a18.pdfIn PDF document text
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/dcd32a7.pdfIn PDF document text
    • https://senekuzoje.weebly.com/uploads/1/3/5/9/135978249/tekonulusiz.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/faviwetaserazibojoj.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/turnaround_time_in_laboratory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6019f25da8095.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/32408591012.pdfIn PDF document text
    • https://cdn.sqhk.co/lebinezekoma/jgia0jZ/judivosedupebokosade.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/penozasode.pdfIn PDF document text
    • https://wolazana.weebly.com/uploads/1/3/0/7/130775510/7381c5df1c7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_6027cfaa96356.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/samsung_aa59-0066a_remote_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_604198a915728.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/gebijhi/patamo.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/ihgfQie/coin_pusher_game_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_6049788b20c2f.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/what_was_the_first_rap_song_recorded.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/jrbgeih/maremaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemileti.atwebpages.com/gaxutufadones.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/41977043570.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/dibefepawemava.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/37442988279.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/fimomixudoximumaku.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_off0000cf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF03 5344 bytes
SHA-256: a09e8c5cc9b26115f33ca4d99e65f0d28f00503eda1e305a0f28ee6390209f47
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 10732 bytes
SHA-256: 931856436a10135bde4bdc2d83aeb22c36680d5588283c8cf7f56358ab047ef5

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