Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b36cbaaff5b361e…

MALICIOUS

PDF

77.6 KB Created: 2021-04-05 05:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 361c45c616a9315b997d5b172e843791 SHA-1: ca6588bb849db68e15191005f23e03ada022b45e SHA-256: 7b36cbaaff5b361e854f756c349b9448fe446b94a779ac8c5d7d0644456b440b
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of an embedded URI pointing to 'maypoin.ru' and the 'SE_INVOICE_LURE' heuristic suggest a phishing attempt. Although no scripts were explicitly extracted, the ML classifier's high confidence and the nature of the embedded URI indicate a malicious intent to redirect the user to a potentially harmful site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/award?keyword=child+immunization+card+pdf PDF link annotation
    • http://help-ruleviolation.com/49728508894j1cqe.pdfIn PDF document text
    • http://goodnatural.space/al_manhal_dictionaryiru7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4c92eb6f.pdfIn PDF document text
    • http://repair-planshetov.ru/78913346499hc0ky.pdfIn PDF document text
    • http://geleostone.online/applied_numerical_methods_with_matlab_for_engineers_and_scientists_third_edition_solution1e4r1.pdfIn PDF document text
    • http://alphabitx.com/watuvewesevivoginu4716u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5ffb0c789cd9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_5fcd6a3e9b7ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5ffdb24ca9d7c.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/xujitezu/57407186514.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/xoxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/45785145564.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/centos_6._10_everything_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac41a5f-5efe-4e7f-89e7-65d14af80811/50745473990.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/aretes_de_oro_en_forma_de_cruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e497e0f3-06c2-494f-b519-6fb7ef5f6a38/dusibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a953b7a5-4bb5-4f8c-9b47-8033dc98c61a/topolinonugume.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/gamelakuwonojabes.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/autograph_all_audio_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d114784e-70cc-4577-ba9e-cbac8c52a72f/96892692221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df235db7-d1aa-42c3-b174-1b5a4b6124e5/41823454050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20655c84-af5b-42de-8b03-8687eb7c8bc7/xagikiv.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_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 5172 bytes
SHA-256: f4e86d719023e16992253912951c9096991f2fb4f9926c0e7855efe2fce86798
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 10688 bytes
SHA-256: 0cf47fd29361bec30395c5203ecdf7d2d221c33ce22766ec50cb0fb7f0aa2fbd

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