Malicious PDF — malware analysis report

Static analysis result for SHA-256 c582991f8f1a45c1…

MALICIOUS

PDF

74.1 KB Created: 2021-03-24 18:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d88b1fbd2cc859565ea88c6c07865662 SHA-1: 0189751f0972b5368209b1bf15dc4d1f2f8b2984 SHA-256: c582991f8f1a45c109ed7b8825919e3c4ea81acb05258155b712bc043677b4fd
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the latter specifically flagging it as a phishing trojan. The document contains an embedded URL that points to a suspicious domain, likely intended to deliver a malicious payload or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the document's content to redirect the user to a malicious site.

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://resalured.ru/award?keyword=fractions+problem+solving+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369330/normal_6029ffda1d116.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/17ihU2l/keyboard_button_mapper_4pda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498404/normal_60214e46e2507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367645/normal_5ff2492c39c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_600f05e843782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_603827f8214e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_5fda421ebc99f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_60357b93a790a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5ff9e00084a9e.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/fosalizuzu/actuaries_india_study_material.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/zurotarexobu.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/58184906188.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/lozeraliviwoxopoloxuwemu.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/47837064963.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_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 5880 bytes
SHA-256: 9747fff3850d782c666bbe5355db681eee77f44aa51230c47027781bf639f616
font_01_sfnt_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 10996 bytes
SHA-256: 42a6d5294af385ec079f9071db85b10e59ca864379ca824c75e37eff318a705a

Open this report in the interactive analyzer, or submit your own file for analysis.