Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f8f576ab3902ca…

MALICIOUS

PDF

69.3 KB Created: 2021-02-18 20:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 93ac98b9f907c8fdcdd33d53a9a6d090 SHA-1: db6e3f7bb9a9b6df7d7fca2eb824f1ec50626c5b SHA-256: 19f8f576ab3902cad7ab776a7eaeca223b708017f7d49879e26ba44a885627bd
96 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious and has been flagged by a machine learning classifier and ClamAV. It embeds external URIs, with the primary one being 'https://druttle.ru/strik?utm_term=crochet+patterns+for+baby+blankets+with+animals', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf', indicating its generation method. The presence of embedded URLs and the overall detection by security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=crochet+patterns+for+baby+blankets+with+animals PDF link annotation
    • http://service-hire.com/38934733685n5of1.pdfIn PDF document text
    • http://widarexidifazi.iblogger.org/fifasatisusidoset.pdfIn PDF document text
    • http://bt-management.website/warranty_deed_wisconsin_formmtkim.pdfIn PDF document text
    • http://hookup666.site/corporate_responsibility_sustainability_report_airbusd0s9m.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/zipajefitit_moxok.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/be61f4843b8861.pdfIn PDF document text
    • https://doguxugufini.weebly.com/uploads/1/3/0/7/130739878/zolofe.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/gepafamadinojoloxi.pdfIn PDF document text
    • https://xalakadumikimam.weebly.com/uploads/1/3/1/4/131437423/fobusoxegedorutip.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/gorajipuxoxusifi.pdfIn PDF document text
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/3f7448bf03f7.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/9af16c054bb84.pdfIn PDF document text
    • http://load-bcp.com/las_vegas_travel_packages_from_south_africaiszzj.pdfIn PDF document text
    • http://requiremcgood.com/short_batman_bedtime_storyvgszx.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/muvarelo/wallpaper_anime_laptop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/linozapam.pdfIn PDF document text
    • http://lusunumef.rf.gd/sowis.pdfIn PDF document text
    • http://wefofumerari.rf.gd/quartz_crystal_oscillator.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/first_or_second_b_notice_form.pdfIn PDF document text
    • http://texakotinize.rf.gd/93842873887.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/xinuzifogujajoduretit.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_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 5560 bytes
SHA-256: 8a8b9bc54cf1f8fe8d0829e22b0cc2256905b3736540f3ec20d8ff8ad45959fe
font_01_sfnt_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 10472 bytes
SHA-256: ec4855c5ff8b8e7ae24db052d4cd41cdf2336cad9d6fd04fed75396bc010306f

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