Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dfabb76d334574…

MALICIOUS

PDF

81.9 KB Created: 2021-05-25 06:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: af4572b9f116035fb08446723cf47244 SHA-1: b9d5e483c0b93981b933687e25b177f81ab92601 SHA-256: 93dfabb76d334574e47b78f139dc6710a504aa85c3cb24eafa552ef1df9e8ab9
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'eidl grant'. No scripts were extracted, but the presence of an external URI and the overall malicious verdict strongly indicate a phishing 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://nipisod.ru/strik?utm_term=how+to+return+eidl+grant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403413/normal_60192944d5660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_605feb3c31f36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465263/normal_5fc9da1e322b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ffe55e5cc180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_6029d18699cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_60217871d3fb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_6058e6b19e7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_60276a4fe40e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5fdfa65ac2b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466151/normal_60635e94c90ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab9a5f5-ca0a-42db-8226-9f0f7800af8b/24378423102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c26c47-fc53-4943-baee-661a4a185e74/theoretical_framework_definition_in_simple_words.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/how_to_reset_fisher_paykel_water_filter_light.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/lagu_andi_bernadee_donde.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/ancient_greece_olympics_boxing_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c63132-9b52-49d4-8d03-e04da876c5bc/why_do_jehovah_witness_not_celebrate_birthdays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bdf3b35-26ec-419b-b9df-4631dbd12956/8632536579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4538feb-c683-4766-b69e-e75a746cd230/samsung_mu7000_55_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/wipizolotatatuvow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8d7229-753f-4894-b115-7accf4bc17b9/12783940419.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_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 4868 bytes
SHA-256: 7780633bb4a31fcbae2f6aac1a45cfc630619515748b2e00133777f0530409a9
font_01_sfnt_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 11044 bytes
SHA-256: 339fff71653909b877d1f3e3399b7e12cb8e5bbacdfd3b15c24e5fc1d8180310

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