Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eb138d7d4e68fb…

MALICIOUS

PDF

80.6 KB Created: 2021-03-09 06:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbf2cef7e6673dfcec19352622892852 SHA-1: 2cdf6e425ae989e46c8aa85a3480349e88ad8e38 SHA-256: b7eb138d7d4e68fbc9b685d457076b5feef96fa72c36ad883eefa1e450fc54c3
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=forks+over+knives+worksheet PDF link annotation
    • http://ruwufuwetoj.mygamesonline.org/references_apa_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_600b42e1527e9.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/kyocera_printer_drivers_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5fe6d26983c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_604371a597955.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/epmp_1000_default_username_password.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450003/normal_5ff4fa27cb66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5fe7b20a9f3d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_5ff285dae9218.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/winesig.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/15939253754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fe40e9749ed5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402933/normal_5fe0fe23b596c.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/faxupixogazexi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fcbf13320768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_602295afd6466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mugazukadum.onlinewebshop.net/how_to_fix_air-o-swiss_humidifier.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/what_kind_of_oil_for_generac_pressure_washer.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/36364873216.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/whatsapp_july_2018_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/blue_movies_app_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/7694320554.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/jane_chaman_jane_bahar_song.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_off000101c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C6 4704 bytes
SHA-256: 8a9f9b06cd9dddbffcd1c662b04823af503dd5d139e0721197de1ab798da47c0
font_01_sfnt_off000111da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 10364 bytes
SHA-256: d04d112e20a860c8e1c44dd622b2d4a308e51bfe7369362ec8f9e5ac9cda6826

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