Malicious PDF — malware analysis report

Static analysis result for SHA-256 849e9961e6d500e1…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 04:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1030d3a7f1944f8bb4222e61f7ba153e SHA-1: 3d2297aa090009403c77595a5c46adf8c5a9e8ad SHA-256: 849e9961e6d500e1491793f9118fb905a7ce30ac2d24edd2661ee19b432fed24
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=gramatica+2+capitulo+4+prueba+answers', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=gramatica+2+capitulo+4+prueba+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376611/normal_5ff909a347ec5.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/bevimonevufenojunobisuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453914/normal_60297ba612e45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5feb4b6db4751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fceccaba011f.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/dolivetiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5ff0161062ce6.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/46615429198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472182/normal_5ff4df6be94bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_600b2ebe8a198.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/wotorizewinemonegatufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_5fdb7238dd7e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://belibivizonojo.myartsonline.com/how_to_set_an_armitron_all_sport_watch.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/88663206866.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/shielded_metal_arc_welding_process.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/attachment_orders_a_guide_for_employers.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/who_is_carl_rogers_humanistic_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/zefasotogib.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/chaar_sahibzaade_full_movie_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/tamofin.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/tanitotalubapolakoneke.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_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 5560 bytes
SHA-256: d7ee17efb2e57ec4d87abd98b989654457f1157d465aec4f18c0c1f8562efac7
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 10436 bytes
SHA-256: ff80ef77f01216d335535309cc649660e3dab36ece98dff6ed786dca3b82c82f

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