Malicious PDF — malware analysis report

Static analysis result for SHA-256 feca1f8eb0512548…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 05:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f342318f767fbfc706c546f377c4293a SHA-1: 995c81409e4531e405941b7106bee5625cec111d SHA-256: feca1f8eb0512548948acf7787e7a0a18d318192e1d30968222185beff19c0f8
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. It contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=double+loop+learning+pdf', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=double+loop+learning+pdf PDF link annotation
    • https://cdn.sqhk.co/balijanawi/geDWjhR/nusuloxipozosajijitagem.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/jfhfyhi/how_many_days_of_spring_stardew_valley.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/39386024598.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/hfhhAja/launcher_ios_14_luutinh_developer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5fe21b0714bc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5fdfcac1b44d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/20c39255-ee10-48fb-8ef1-958346e5b7e5/washington_redskins_win_loss_record_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c873e576-9be1-455d-b03e-5fbada7b8bf2/44526455030.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/what_does_kinetic_mean_in_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efce3c38-6c15-49ac-9d29-023ec79b4b0a/7574847814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ad33c2-648a-4e59-bfd3-6823011260fc/how_much_is_an_igniter_for_a_gas_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319e8019-425b-40d3-ae8a-4f4eaba2c895/eyelash_extension_training_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f3947f-ef0f-46ec-a7fe-f8dbff2697c6/zoxojipewidirav.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/does_taco_bell_still_have_the_meximelt.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/86071600337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca691ff-83e2-4ca4-bff1-5acc5f0d2804/zeripagivaborakumivusuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd9a513-fbe0-44ad-b8d5-eaaa87591968/sixebewabopogituxuluneze.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/samasibes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68329758-23c5-4308-a365-d881d0ca4ad3/maxafokibimopino.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 4972 bytes
SHA-256: c13eba9484d8cf5b507f7371546cb1f376786e336ca6d8b3850cede6684bce4d
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 10072 bytes
SHA-256: 53814ccea80aa86ff4560c8afcc9a372a96662b55b5e2d31ab3744884788a9f5
font_02_sfnt_off00011bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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