Malicious PDF — malware analysis report

Static analysis result for SHA-256 3826e560983fc7b4…

MALICIOUS

PDF

91.7 KB Created: 2021-03-02 21:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf71aeaec04b679d4d541dff6da0e0aa SHA-1: 2a9f5b05ca0f75c12caaabc519891466302bf81d SHA-256: 3826e560983fc7b4bdd8128d509811a8f65796b139f191484c23bbec8b101d75
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 0.9992

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/strik?utm_term=syllabus+methodology+philosophy+of+science PDF link annotation
    • https://cdn.sqhk.co/vopofuxo/ANgeO6i/29316724183.pdfIn PDF document text
    • http://henrysavbr.site/44070550426zebzc.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/5djcPE5/waluropime.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/the_last_lecture_randy_pausch_video.pdfIn PDF document text
    • http://prodit.space/baa_nalle_madhuchandrake_kannada_movie_songsyvgo0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_603c5753de90a.pdfIn PDF document text
    • http://wowmarket.info/best_buy_ipad_pricesoik85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413469/normal_5fcaf549c40fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6025145775d79.pdfIn PDF document text
    • http://prodson.space/addition_to_remarksilvoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449185/normal_5fd8d1c18abaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/jjooFgd/budivogudikifad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5ffa42adb9f15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5fccd422f0121.pdfIn PDF document text
    • http://triple-doska3.club/xodusutapipepopukefapowi8l74f.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/taxexuwinuvex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_601b9a7cda72a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/ms_data_science_uc_berkeley.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/pebble_steel_watch_band_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/59342316184.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/whiter_shade_of_pale_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/ashampoo_burning_studio_18.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/patelixufusoponepiv.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_off0001232c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 5820 bytes
SHA-256: bb8c3ae8b5382e761b3af380edeb1b07f8a4a0f28a8e99139ee39cb667f610c0
font_01_sfnt_off000136e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E2 12612 bytes
SHA-256: 8982955001fa975266d92305fa057c25916555a4bce622866aaf6ff82fe6a6be

Open this report in the interactive analyzer, or submit your own file for analysis.