Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baafddc97e34c6b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 20:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1c0e0bd80d0e5313acae0c5e7a265f3b SHA-1: 49bee5a5092cef70ee5c55f52ce290326beaa641 SHA-256: 8baafddc97e34c6b2fc5cc3eb203ff021cfc35a0f8a094a23d2b3c7425a12a5e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'pelibifir.ru', which is flagged as a suspicious URL. The document body, though heavily obfuscated, suggests a lure related to language conversion, aligning with phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://pelibifir.ru/award?keyword=convert+pdf+to+word+arabic+language PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416928/normal_6018c02a85904.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/how_to_connect_brother_printer_hl-1110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_604f78985557c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6015b7073290f.pdfIn PDF document text
    • http://fapenas.22web.org/wagunemivugezurinider.pdfIn PDF document text
    • http://bevatijiwavefad.22web.org/video_title_animation_software_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386836/normal_5ffb0f2e132d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5ff7752ebcd11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5fcc1d0380678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merapuw.epizy.com/garaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/76428534717.pdfIn PDF document text
    • http://mufunalera.rf.gd/zurebegoxipogelaben.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/ketone_body_formation_site.pdfIn PDF document text
    • http://lenixad.epizy.com/xebabotim.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/carefusion_alaris_pump_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/nordictrack_exp_1000_xi_maintenance.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/37018103877.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/tijixuvarav.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/jofuba.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/nalorunubogodupikerejiz.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/compulsory_heterosexuality_and_lesbian_existence_buy.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_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 5344 bytes
SHA-256: dc86be6e8b0500c5e082c69075efec377f5aab6f01c27d539f2cb8e575b1e0e1
font_01_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 10724 bytes
SHA-256: 0428011cfd8597f0bb0d3b9a79c38c6bca88abd9aca24de4d2c7f62cfcc800d3

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