Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b65c7c5981f6e9…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 22:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8068b1c653c70f6c5e152a41b3d3363f SHA-1: bc732eb8d1f81a58084d1160055fc8730fe648a7 SHA-256: d3b65c7c5981f6e9aa3b81c8cefe5094837d1cbad078d0d9fd6b62f4b552e491
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within seemingly legitimate content, such as a tutorial. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

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://leonvi.ru/wix?keyword=jurassic+world+the+game+hack+2020 PDF link annotation
    • https://cdn.sqhk.co/venitalobeni/aspjgtX/jolipuvijudifupizogibu.pdfIn PDF document text
    • http://xitnet.fun/40775067808ncb7r.pdfIn PDF document text
    • https://cdn.sqhk.co/fibafape/wwhfLZL/game_dev_story.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hjtihKT/cake_maker_game_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/njdehaU/5880759894.pdfIn PDF document text
    • http://newyearshop.site/4777483693101xyn.pdfIn PDF document text
    • http://glossywp.online/tobunodolajusagsafh.pdfIn PDF document text
    • http://rafale.store/xizefisulezazapur8w55i.pdfIn PDF document text
    • http://gradstroy.su/tikabonekowupang2ts.pdfIn PDF document text
    • http://max-lifting.store/18657617886uckec.pdfIn PDF document text
    • http://avtovishki-msk.ru/automated_traffic_bot_apk_downloadrea0t.pdfIn PDF document text
    • http://help-verification.com/graphing_quadratic_functions_worksheet_answerswlupq.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/fibokesuruliroretar.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/mogujupu.pdfIn PDF document text
    • http://nozatisesufi.scienceontheweb.net/watogurekiniravuludimine.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/what_is_the_salary_of_electrical_engineer_in_pakistan.pdfIn PDF document text
    • http://1green.space/how_to_ship_internationally_usps_ebaylmnl5.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/42710125517.pdfIn PDF document text
    • https://cdn.sqhk.co/metumolalub/hgGn4hi/bexotewininakupeweg.pdfIn PDF document text
    • http://vbruti.site/horse_riding_tales_gamefd9kn.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/2df030a3-ea70-414f-8510-d78d0cd1f4ff/weebly_tutorial_for_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2970bf2c-337e-481b-877e-371608d07f7d/when_pangea_split_into_two_continents.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/that_would_be_great_meme_office_space.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 5772 bytes
SHA-256: c8c250b7d28b383e48d96dd16b58c2bdc578191f38a7b24af390713f37ea2cbc
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10268 bytes
SHA-256: 130b45faf01a2cc8019325d3b66e3510a287d399d916875dd2cf65fb22e11aa7

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