Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f20d3ead1939ef…

MALICIOUS

PDF

78.8 KB Created: 2021-03-29 06:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10876d94481997e83b9a8c5f113f98f7 SHA-1: 1f73eebfcc80481cb9e82140fda43cb71464273e SHA-256: 14f20d3ead1939eff93b896da40202d657c7b8cca1f591cfee8422db0ccf2a23
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://mezovuduw.ru/wix?keyword=the+four+agreements+companion+book+pdf+free+download PDF link annotation
    • http://idealica-official-it.website/esma_remuneration_guidelines_aifmday98m.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/tularotefepot.pdfIn PDF document text
    • http://wordsidepost.top/jenonomawixogkfg98.pdfIn PDF document text
    • http://karnaval.host/list_of_electronic_components_and_their_functions_ppty4ndf.pdfIn PDF document text
    • http://risonubokedoxav.scienceontheweb.net/wonitizuvofiwebidijinir.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/51860f44-0bef-46d1-8b49-c750dd5897f0/28916713555.pdfIn PDF document text
    • http://lunagugodojeb.epizy.com/tipos_de_sustantivos_ejemplos.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/7038175217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c250c3-b0be-4ae9-b16c-aab1dbd8da14/ms_in_data_science_texas_tech_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315550b7-7d08-484a-aff1-5a3f30ecb1d6/25859393547.pdfIn PDF document text
    • http://gikunipif.epizy.com/clasificacion_de_las_ciencias_formales.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/277198498.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/negefikaxinesovetemerun.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/grapher_equation_plotter_solver_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/bleacher_report_nxt_uk_takeover_cardiff.pdfIn PDF document text
    • http://jujufalos.rf.gd/xazija.pdfIn PDF document text
    • http://lowevuribif.epizy.com/dasaloroperum.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/cdc_guideline_central_line.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_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 5816 bytes
SHA-256: c0b0c89b4285751f779731d424b332fed79d02f0195f80f01b0e557e85503656
font_01_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 10908 bytes
SHA-256: 4883698be8f217401136287c995a7e696962a26dfcf5f4e2210f314e620815fe

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