Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9c7e10cf3bbeb0…

MALICIOUS

PDF

64.7 KB Created: 2021-01-13 15:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 717d2958450d76effba07599344aa36b SHA-1: ef8db8f9330935a6542df656e81f75da39502f63 SHA-256: df9c7e10cf3bbeb088e615f5688e9905f0b329d57796e6b8bce8a86accc1b7d1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to a 'certificate form haryana'. No scripts were extracted, but the presence of external URIs and the overall detection profile 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://trafffe.ru/aws?utm_term=economically+backward+class+certificate+form+haryana
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/bosikapaxag-nejunuwuzaxez.pdf
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fcf7bfa7182f.pdf
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/3fcfcb8.pdf
    • https://static.s123-cdn-static.com/uploads/4492272/normal_5ff0bc0de79f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/risalenefazozo/88929357654.pdf
    • https://s3.amazonaws.com/zalisujezajaje/enkay47_answer_lyrics.pdf
    • https://s3.amazonaws.com/wuniku/australia_visa_application_form_uk.pdf
    • https://s3.amazonaws.com/solonebosop/buyology_download_free.pdf
    • https://s3.amazonaws.com/begijufadi/estado_de_perdidas_y_ganancias_contabilidad.pdf
    • https://s3.amazonaws.com/vuforewebub/introduction_to_geographic_information_systems_9th_edition_download.pdf
    • https://s3.amazonaws.com/goviwigax/1232945461.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e7.bin
00199cc935afa727162acb54ec130135fd8887610745643e5b3ecec9bc16de39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E7 5616 bytes
font_01_sfnt_off0000d3f0.bin
0b1b5904b5a807e05e441ea0f0a6d45362f6b9f8b8598d221c53d36c8af48a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 9892 bytes

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