Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fe5e1819cdea51…

MALICIOUS

PDF

75.1 KB Created: 2021-03-13 21:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0526309ea4c9887298ae8241b85dca26 SHA-1: 74f50250f837696feb41accc3958ff4768d5a848 SHA-256: 26fe5e1819cdea51c9249c5c27e05e20e4211312243e8da8e5adebcc1b732229
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://kuzutuzo.ru/wix?keyword=animal+crossing+pocket+camp+cheats+leaf+tickets', indicates a lure related to game cheats. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=animal+crossing+pocket+camp+cheats+leaf+tickets PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/cggnggN/77771023463.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/75658121891.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/a58bba58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_602e785b4eb18.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/igc3iii/dandara_trials_of_fear_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/cjhLYz6/kiselexozijeja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382781/normal_5fee6cd94343f.pdfIn PDF document text
    • https://fekadoripegat.weebly.com/uploads/1/3/4/5/134592683/veninu_bawexun.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/cfop_vs_beginners_method.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/the_constitution_of_liberty_audiobook.pdfIn PDF document text
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/tabam.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/9iiji5w/20263297411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_5fe6a092b5cc2.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/wujowibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6041d6ac3fc73.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/jivuxo/vasapovuvetivejebaja.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/flight_sherman_alexie.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/27710864459.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/85622812516.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/e._l._f._beauty_inc_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/bavurivesopep.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/socomec_ats_400a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/47639791348.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/46313567907.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/zodid.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_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5480 bytes
SHA-256: bb0c992a2ac2bb5e02d264b196083668ca4d9c5b7c7c5bc79b1ea3e569f7e4be
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 10468 bytes
SHA-256: 5563f6b87c7e3bf9297979802eb9ad4e38c180041163997837fbdf71461471a6

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