Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d96b57c04c795c…

MALICIOUS

PDF

70.3 KB Created: 2021-03-01 06:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4b93ec14c035d78a5a1d63dff8f1414 SHA-1: a6905acb63a8df8bbb959f4da45c54fa65ae510e SHA-256: 98d96b57c04c795ccfa370be989c11d65b00f3980097ee15fd95f2e17baaf4f2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs and a link farm on disposable hosting suggests an attempt to redirect users to malicious content or phishing sites. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading something.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://golowaki.ru/wix?keyword=sequence+of+events+graphic+organizer+printable PDF link annotation
    • http://xojuxegalixiluj.66ghz.com/rifapajukob.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/jidjajd/wafufatemivowazizugab.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/W0a9gdb/happy_thursday_orange_flowers_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_6023de19ceac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_5febbff635876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_603c5fb45e9e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/gumikajobirexizivolametov.pdfIn PDF document text
    • http://wuvesuwenelagaj.rf.gd/berklee_bass_guitar_method.pdfIn PDF document text
    • http://fezovinu.epizy.com/pak_navy_jobs_2020_for_females_after_fsc.pdfIn PDF document text
    • http://fisavisifesu.epizy.com/gofedezirokezafemipubule.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/texas_drivers_handbook_answers_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/11225672358.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/daytona_beach_police_department_incident_report.pdfIn PDF document text
    • http://www.readwritethink.org/classroom-resources/printouts/sequence-events-chart-30580.htmlIn 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_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 5756 bytes
SHA-256: f0c7e41f8e279f623c6b7ceb34f043f4c6657ebc1b69f5161bfb759891adee91
font_01_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 10348 bytes
SHA-256: 892e9217ba7397385eb559a05e456b3eb6b2198cdadeb9c15810a0541a16f434

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