Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbf9ea76b2aa9f7…

MALICIOUS

PDF

80.3 KB Created: 2021-03-30 16:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b60a7274980489a631947faf701c6c23 SHA-1: 560a4fac286e0a0862233252d3d33590b264b67d SHA-256: 8fbf9ea76b2aa9f7e8227ad4a4179afe4c6e6f4aa0cb7868f953c417faebf47b
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 0.9998

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://resalured.ru/wix?keyword=dhgate+hair+reviews+2019 PDF link annotation
    • http://winoorama.website/kafixe564di.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_6051ca9fbe6e3.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/49607028295.pdfIn PDF document text
    • http://gravkamen.ru/68808132100ww9pa.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/975099f13d5ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd630dd93dc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5fdd4101239c4.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/bexiwaxojakim.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/1395655.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/5ba3cf3ecb2.pdfIn PDF document text
    • http://creampiepow.club/restricted_holidays_2018_tamilnadu88xk0.pdfIn PDF document text
    • https://mepowubufavi.weebly.com/uploads/1/3/4/8/134858245/7724879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383574/normal_5fe21028a0566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5fe5b9c74c1b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketanuviz.epizy.com/creature_movie_ka_all_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fc9e9b-9425-499b-a497-bf0fb8550c4a/multiple_intelligences_activities_for_preschoolers.pdfIn PDF document text
    • http://rawozenagi.epizy.com/45421130904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e1ea44-1b9c-4095-af68-2d76cfaba409/temafun.pdfIn PDF document text
    • http://lofomaseforuz.rf.gd/18902110813.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_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 5548 bytes
SHA-256: 2f49d2d8930836df0f50c07b1ea7baf8d0af887c43a73b9826b46b88ce07a757
font_01_sfnt_off00010cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAD 11720 bytes
SHA-256: 2cd5f6807b1a9f7d1f9cd799c39572de28101e6838783a9cce7be3ae31490272

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