Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed48151dc8f98207…

MALICIOUS

PDF

73.3 KB Created: 2021-04-04 23:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60fabd3e5870feca892f8c5c820b2f0c SHA-1: 588f4b30b21a63a7bab07687d865a07749bfa746 SHA-256: ed48151dc8f982079b40c8b7d2fb5c14141aeee1e41a3867b09511197840d85c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=animal+cell+culture+basics+pdf PDF link annotation
    • https://lutavazakagege.weebly.com/uploads/1/3/1/3/131398084/87c9d4.pdfIn PDF document text
    • https://pemiliruvobavex.weebly.com/uploads/1/3/0/7/130739389/japozinopo.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/labusunegen.pdfIn PDF document text
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/56079ddcf5.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/lovanazumesok.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/beato_bartolo_longo.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/xofomijuk.pdfIn PDF document text
    • http://kurutog.mygamesonline.org/xamafibu.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/1324392.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/ey9gcib/mcdonald_s_menu_breakfast_all_day_malaysia.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/tcs_ninja_quantitative_aptitude_questions_and_answers.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/21745369802.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/nowikimo-kidivixawodef-xarixezitusuron-ropawabote.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/74351962217.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/x6igihT/3215764575.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jjRhhbn/poblano_pepper_scoville_unit.pdfIn PDF document text
    • https://cdn.sqhk.co/wepuvumug/6jjhbnu/tubegojotopawupewufuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomalowo.epizy.com/wisuxosudiki.pdfIn PDF document text
    • http://sowotasewow.epizy.com/hallelujah_amen_from_judas_maccabaeus_sheet_music.pdfIn PDF document text
    • http://dunogulazemetus.epizy.com/cordon_umbilical_definicion.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/civil_engineering_drawing_books_free_download.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_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 5432 bytes
SHA-256: eac6901011e2ce15780e9db4accaa3337b0c425eea9def95e51288808c18ab11
font_01_sfnt_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 10136 bytes
SHA-256: 5ea958f1d231795e0a586ed8fb45885a083cc538aa7a706b8d2f78a75ecfad35

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