Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a13b65336e0e1c…

MALICIOUS

PDF

66.7 KB Created: 2021-02-18 13:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 21f532a1bcad4f220174c754cd956a1e SHA-1: 2f254aa20c966a4d3c5ed28d34ac7f157fee847e SHA-256: b2a13b65336e0e1ccf09b5280f68893cc6e9dac8b634fb1077a864ef51c03d84
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and specifically for credential phishing. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates an impersonation of Netflix, directing users to a redirector URL. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/3f3a77aa.pdf.
  • 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://bologen.ru/aws?utm_term=miguel+street+summary+gradesaver PDF link annotation
    • https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/3f3a77aa.pdfIn PDF document text
    • https://samituvejasuw.weebly.com/uploads/1/3/1/4/131406365/9872060.pdfIn PDF document text
    • http://motivawka.online/rekozabavuwubuc52.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/R1ntQ5F/home_pony_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jbxSge0/chicken_invaders_5_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/cjhxlIL/manor_matters_app_store.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/959bf2be7cb36e.pdfIn PDF document text
    • http://naturalm.space/40179991574zuhms.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/jetstar_787_business_class_trip_report.pdfIn PDF document text
    • http://salonvarna.com/examen_de_primero_de_primaria_tercer_bloquefjber.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/wowaveko_kuwobeboru_zobapileget.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mekamaxabojumoz.epizy.com/pobokirelowapumexelives.pdfIn PDF document text
    • http://jiresigotapikeb.rf.gd/etre_avoir_present_exercices.pdfIn PDF document text
    • http://zetulinug.rf.gd/71289642631.pdfIn PDF document text
    • http://falufobi.epizy.com/18382503873.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/convert_guitar_chords_to_piano_sheet_music.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_off0000c8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E6 5312 bytes
SHA-256: 48f814f532b374242b861c1bde8310f36e35fc24cd0ca4191ca842deb6102ba9
font_01_sfnt_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 10332 bytes
SHA-256: 9c15c5242c5d6f1e348eee6b7cd253b474430e86e1116fe6d0f56d9ef2b4364d

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