Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c99d0e09e50271…

MALICIOUS

PDF

66.7 KB Created: 2021-03-09 19:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 97aaf1612ddf2ff6276f93ac600927fd SHA-1: 5ac5aee7c690ec583c1a3af562f2bb743bc1f044 SHA-256: f9c99d0e09e50271ca19bbac6b8cec96c98e8f5f83274d37c894b9d899feca72
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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=excalibur+soul+eater+cosplay PDF link annotation
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/1935303.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/ejbiehi/tefuzilevizeg.pdfIn PDF document text
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/kovebizidojagok-gatetarowevej-tanalapi-tipedukofunutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_603176df6505d.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/movomudozusetebidebigo.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/morasijimon.pdfIn PDF document text
    • https://sofirutowik.weebly.com/uploads/1/3/1/3/131381411/24721035a40.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/jG5HVfF/93515959191.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/what_are_the_problems_of_being_very_rich_and_information_poor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495994/normal_6004f513081ea.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/que_establece_la_ley_de_ohm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce4e378eb73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fefc805758d1.pdfIn PDF document text
    • https://cdn.sqhk.co/fagijopi/oiaMjfW/92130850158.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/60786967898.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/53846781812.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/kenifabesubixisevibavup.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/fghjfBB/83413857970.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/f03896bd-57d2-4742-9a61-9752ccaecd20/27973692216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25297ad5-44a2-48e1-92e4-fcb4fd4ae9cc/percy_jackson_films_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0f20f2-010e-48ce-99c5-94d55bfa7ba6/johnson_6hp_outboard_motor_parts.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_off0000c82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82D 5192 bytes
SHA-256: 39a7a7f731deec5104bab9fc68b3762652603d907ee6039569d10c22ddd7e09a
font_01_sfnt_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 10232 bytes
SHA-256: 2a3856ee54d9eed0e403dfe5b3af3835224fd53a4717e5f63f3eb9aab689b889

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