Malicious PDF — malware analysis report

Static analysis result for SHA-256 2550eb956e7fa4b6…

MALICIOUS

PDF

70.0 KB Created: 2021-03-27 15:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71af86ab6ae4d6fc2adb502e4d536c52 SHA-1: 896a098f4e4ddf79da2721c769c30a59838379d0 SHA-256: 2550eb956e7fa4b66b4ca0577c69bf09a5afdc918d2423d8348257f7a7984928
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://fokemale.ru/123?utm_term=skf+bearing+catalogue+book+pdf PDF link annotation
    • http://movoxazukum.22web.org/federalists_anti-_federalists_worksheet.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/navien_ch_240.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/html_css_js_carousel.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/tekidutitexeginukobi.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/pdf_to_word_converter_google_chrome_extension.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/isabel_allende_biografia.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/what_are_the_7_electromagnetic_wave.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/3fe25654-a399-4207-809a-aa90a2d185e9/gikob.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/section_3._1_the_rock_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649b2b97-a452-474b-88f4-122b9e40bf8d/vitokusidew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1615378d-3d01-4181-a08f-bc04c68e3fcf/limexutikobanaxa.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/balance_sheet_and_income_statement_sample.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_bfb23ad830764fa48ee2a2f6a9d2552c.pdf?index=trueIn PDF document text
    • http://diwesetudu.epizy.com/20476845709.pdfIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_5fb8f55168df446fb59aac0a057fa78e.pdf?index=trueIn PDF document text
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_9e090b24a46e4976a96d9772b287fe6d.pdf?index=trueIn PDF document text
    • http://lumosaneja.onlinewebshop.net/meditexalovaxavapomugasa.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/47940228028.pdfIn PDF document text
    • http://nuzinigezabab.rf.gd/aerospike_engine_design.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_96d66dd9482742bc92189c057485daae.pdf?index=trueIn PDF document text
    • http://sisaxelusus.epizy.com/exercices_sur_l_accord_du_participe_pass_avec_avoir.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_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 5452 bytes
SHA-256: 043b6442bd8516dba2b6a0f65a1c091a35cb651019af0cf8972163dfe55b6b59
font_01_sfnt_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 10740 bytes
SHA-256: 2bfcbd75ea6ff4cc53a24192943a9bcf58b48f813d2c517e438f16463bd212eb

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