Malicious PDF — malware analysis report

Static analysis result for SHA-256 053d6ac837ecabbc…

MALICIOUS

PDF

98.0 KB Created: 2021-04-02 22:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fee84ad89524616a56299a37e3c7e08b SHA-1: 5ef0acf33e8c949413ec7f5da5c7013cbb14e42e SHA-256: 053d6ac837ecabbc34c150a9f5f4f856e3b5db1fef8824e0ae9134b05b55204b
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 0.9997

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://vilenefex.ru/strik?utm_term=finite+element+method+software+list PDF link annotation
    • https://wefisejeradez.weebly.com/uploads/1/3/4/8/134886640/4508425.pdfIn PDF document text
    • http://6gusevshop.space/28109794859ivtrr.pdfIn PDF document text
    • http://study-english-04.space/dividing_complex_numbers_worksheet_answers5vjqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_5fd2afce7df89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_5fe1eabb7de8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5fd7c0af3e2cd.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/gavupesorajovu_woronud_susezow_kusolino.pdfIn PDF document text
    • http://dream-stat.ru/bunajowajadalowi2jpzq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_6044672222736.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/0e234f16ab36a3.pdfIn PDF document text
    • http://gufutaca1.xyz/aur_aahista_kijiye_baatein_whatsapp_status6fogl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_6020626c74d64.pdfIn PDF document text
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/7100105.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/the_red_tent_book_summary.pdfIn PDF document text
    • http://emirofficialzm.com/14346075849252xi.pdfIn PDF document text
    • http://ru-dev.xyz/office_365_quick_reference_guide0yc2s.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/schoolhouse_rock_live_script.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/genetics_exam_questions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vawerudarasikow.myartsonline.com/mortal_engines_full_movie_dailymotion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13312 4980 bytes
SHA-256: 10924edca0cc117d791f217ee11fc6ca320dd7c7abd08d1916b052ed5279c850
font_01_sfnt_off000143db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DB 12656 bytes
SHA-256: b9c4f8960c7a320861719fb016e18cf1bbe7a31a58364c41a74debee5e3a443c
font_02_sfnt_off00016c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C51 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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