Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f371ae9165da01…

MALICIOUS

PDF

157.1 KB Created: 2021-02-19 21:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ce7da0c4ea6d2fe9546f6f00b524d60 SHA-1: 0a89567cc85dcf78bce1a9783b42c8ed6d668253 SHA-256: 30f371ae9165da01f5a9cf288ee1c7f022843439c76f3139c03b1c5cd0f43b78
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document exhibits multiple high-risk heuristics indicating a malicious social engineering campaign. It employs a browser extension/update installation lure, a password-protected archive lure, and an MFA/one-time-code harvesting lure, suggesting an attempt to trick the user into compromising their accounts or installing malware. The ML classifier and ClamAV detection strongly support its malicious nature, pointing towards a phishing or credential harvesting operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=wavlink+n300+wifi+range+extender+manual PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/noicIEP/kukivezakolotebafalumima.pdfIn PDF document text
    • http://beststudent.space/7_minute_vocal_warm_up_pro_modk81un.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/68669c0a796.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/ULSVvwK/7_day_deals_amazon.pdfIn PDF document text
    • http://qupieasy.online/32410819238kgrpx.pdfIn PDF document text
    • http://avit0.pro/surotejanutovuwazemarq9uy.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/hjXu6ic/4183823287.pdfIn PDF document text
    • http://julozagoren.22web.org/belgrano_river_promocion_formaciones.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/lesenerolubuzib.pdfIn PDF document text
    • http://vbruti.site/bigodijuruxalemugoteweqhy.pdfIn PDF document text
    • http://sallles.ru/calendar_2020_september_month4nvgr.pdfIn PDF document text
    • http://ejqy.com/gezalowizovubaninusoji2lks7.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/Lgfyngx/39264575737.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://nizizebubo.epizy.com/21740488574.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/57570165884.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/wulowiduxadelone.pdfIn PDF document text
    • http://mowosafawun.rf.gd/yaesu_ft_7800_bedienungsanleitung_deutsch_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/acting_lessons_v0._3._0_apk.pdfIn PDF document text
    • http://jibovofafef.epizy.com/freelance_hiring_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/guinness_nigeria_plc_annual_report_2010.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000218e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218E9 1684 bytes
SHA-256: 4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50
font_01_sfnt_off0002214d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2214D 5424 bytes
SHA-256: 8043bff65e3bda30924339fa6f0a4177f207cc98aa177273edb2a8071eb7a0c3
font_02_sfnt_off000233be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x233BE 10504 bytes
SHA-256: 576e1722bf5e50067785fb75505e9cca9f61dbf0c439fe0ec2b02586ebed8fdc
font_03_sfnt_off000257af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x257AF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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