Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fc8ad1ae9a0a7e…

MALICIOUS

PDF

84.6 KB Created: 2021-02-22 20:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b99754e883908d687454d9837cfb66e2 SHA-1: 678d8ab4612fc7335d5f36891c205332a9482cb3 SHA-256: b0fc8ad1ae9a0a7ef37af5abfeb2a28f716e195e4988484a2dbc2f8e202c9dfd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs indicate it is likely intended to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=literature+and+the+writing+process+mla+update+%252811th+edition%2529 PDF link annotation
    • https://cdn.sqhk.co/tatidukigag/ioyhbhd/space_warfare_movies.pdfIn PDF document text
    • http://ipoteka.net/tapamemizekomolapemexekaocfq.pdfIn PDF document text
    • https://luxisawevevolal.weebly.com/uploads/1/3/2/6/132682936/f9692868738f.pdfIn PDF document text
    • http://bukejasinopa.22web.org/hives_treatment_guidelines.pdfIn PDF document text
    • http://timecodes.net/bubuzibuxafowijiraxupijh7rz8.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jhWNidD/91066145891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_601a1a16215ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5ff4a1167b56b.pdfIn PDF document text
    • http://reduslim-ufficiale.website/report_landlord_tax_evasionw8xvl.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/8388891.pdfIn PDF document text
    • https://cdn.sqhk.co/fibapezo/YWSBi3Z/29575685300.pdfIn PDF document text
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/dufibebeju.pdfIn PDF document text
    • http://mxbur.fun/123065220505p7a5.pdfIn PDF document text
    • http://repair-kompov.ru/352217315278sxr4.pdfIn PDF document text
    • http://hookup154.online/creo_assembly_tutoriala38zp.pdfIn PDF document text
    • http://bubble1.space/922901946930hzky.pdfIn PDF document text
    • http://file-id.ru/manoduuqw1.pdfIn PDF document text
    • https://motisodufar.weebly.com/uploads/1/3/5/4/135400919/2747185.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/fSzigjh/evmap_electric_vehicle_chargers_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_6022933d8ee5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kabasefojegozaf.epizy.com/diy_platform_bed_modern_builds.pdfIn PDF document text
    • http://vatunewit.epizy.com/peganatuzivukixav.pdfIn PDF document text
    • http://zowisoburime.rf.gd/format_sqlplus_output_oracle.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_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 5728 bytes
SHA-256: 30ae9af18e8fe61dec3163a18948b23d1b77c923b0163098f770f9a185769aca
font_01_sfnt_off00011f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F08 11100 bytes
SHA-256: 88f910b8cd3979e1782244ca65df00b122c466c79a406a1655611c78264ed727

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