Malicious PDF — malware analysis report

Static analysis result for SHA-256 d335a078047db14d…

MALICIOUS

PDF

77.5 KB Created: 2021-03-23 16:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 030d2d80478980b0f49a0f37d3734007 SHA-1: ab9e491d470a10b7061ada1905b59513450642bd SHA-256: d335a078047db14dd978b081708d5927e3161e98575ffcbbdd3437c9e0fd0252
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a search result for an educational textbook. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it is used to redirect the user to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=holt+mcdougal+algebra+1+online+textbook+pdf PDF link annotation
    • http://myyshooop227.site/58554152514qahb3.pdfIn PDF document text
    • http://pasetbs.xyz/kofel06c74.pdfIn PDF document text
    • http://genusadnlo.space/sezuwapodekc153.pdfIn PDF document text
    • http://francobusiness.com/aashto_lrfd_bridge_design_specificatqdm6x.pdfIn PDF document text
    • http://fkpravo.ru/raymond_pallet_jack_error_codesr2eo8.pdfIn PDF document text
    • http://numidib.22web.org/hedonistic_sustainability.pdfIn PDF document text
    • http://crispyset.online/how_much_does_an_engineering_manager_make_ukskepn.pdfIn PDF document text
    • http://sayfelengs.space/kurekin480g.pdfIn PDF document text
    • http://natlegend.space/que_es_leucemia_linfoblastica_agudatu41r.pdfIn PDF document text
    • http://ibkreactiva2020.com/sineromunigawukagegailkj6.pdfIn PDF document text
    • http://douchely.xyz/free_template_for_business_expenses8mgyl.pdfIn PDF document text
    • http://ukranews.site/contour_ts_glucose_meter_user_guidefsddr.pdfIn PDF document text
    • http://classicalnaturally.com/gegatimegudokigp5dxd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winibosekuzel.epizy.com/74460729744.pdfIn PDF document text
    • http://topagujowulefe.epizy.com/94885445864.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/27470045467.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/barnstead_thermolyne_6000_furnace_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/20558133246.pdfIn PDF document text
    • http://paruwegugu.rf.gd/rinnai_gas_heater_516tr_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/29133774393.pdfIn PDF document text
    • http://nibijifituvi.epizy.com/59540580214.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/can_you_grow_romaine_lettuce_indoors.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/zixiwizalujakez.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/dinghy_towing_guide_2003.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/sentencing_council_guidelines_theft.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_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 5580 bytes
SHA-256: 4fef535e8523f8a186f6b2d365d04180c2e080e7e3dadcd867a1fb9d8b647672
font_01_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 10896 bytes
SHA-256: 4980d97b98ab407fd56dbf9bb84a673f07f8248ab9434fb71f95b23307d009f2

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