Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa2284ada28f52f…

MALICIOUS

PDF

88.1 KB Created: 2021-04-04 20:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a846f63e38d91daa8672d54d452152a SHA-1: cffdb3922c9a05b01f5596640bb8e372f0a73ecb SHA-256: 1aa2284ada28f52f1249f0c5f14d067fa5e7dd5f752384e10eea7a6dce7ef54b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of PDF-specific heuristics further supports its nature as a malicious PDF.

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://jottigo.ru/award?keyword=benicar+20+mg+bula+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe39413a7e18.pdfIn PDF document text
    • http://limons.space/219658165450x5av.pdfIn PDF document text
    • http://nosinoski.shop/does_xbox_one_s_support_120hzfk8da.pdfIn PDF document text
    • http://kvyovk.xyz/2010_chevy_malibu_ltz_power_steering_pump0c397.pdfIn PDF document text
    • https://gipegilut.weebly.com/uploads/1/3/4/6/134699389/2368531.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/roxapera.pdfIn PDF document text
    • http://m-ryanaf.site/75709923875unxmo.pdfIn PDF document text
    • http://wopizup.mypressonline.com/industrial_engineering_in_apparel_industry.pdfIn PDF document text
    • https://duvafoxugijotad.weebly.com/uploads/1/3/5/3/135305538/d3111c71d23b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497368/normal_5fe0fd2e75db0.pdfIn PDF document text
    • http://begemotiks.fun/literary_devices_examples1f9r9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lafagelupuf.myartsonline.com/carol_ann_duffy_anne_hathaway.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/balunga_toka_all_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/cuantos_dias_es_normal_que_se_te_retrase_el_periodo.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/hp_elitedesk_800_g1_mini_i5_specs.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/81732727807.pdfIn PDF document text
    • http://kejefutipetube.epizy.com/recognition_employee_performance.pdfIn PDF document text
    • http://nufularo.epizy.com/belkin_router_f7d2301_v1_setup_download.pdfIn PDF document text
    • http://wufalejopasedor.epizy.com/jimejaporuven.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/esker_hills_course_guide.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_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 5760 bytes
SHA-256: 2e0ada26cf1f4a9f10c249d368141e3a2fa37d2aa09ccd39a63695b08ad033d0
font_01_sfnt_off00012880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 13360 bytes
SHA-256: 5ee10c43f4830f08b4de2034fb09e3f892b52be5b74664e6bed29eebf8bf0acb

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