Malicious PDF — malware analysis report

Static analysis result for SHA-256 0731aa22b0d9938a…

MALICIOUS

PDF

73.7 KB Created: 2021-02-18 14:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 60297ec8f1fda6961e2a15591886add0 SHA-1: cca6f2592ab8082a33570bfc7f85575b0e8ca1b1 SHA-256: 0731aa22b0d9938a73c0bf4ad29ea9610df6d3c6a17d7b90ac05fc7808ef9f73
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, and multiple other URLs that are likely part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to organizational structure, suggesting a phishing attempt to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=cual+es+la+estructura+organizacional+de+una+empresa PDF link annotation
    • http://submonster.xyz/zaxekanamagajabewec4s9q.pdfIn PDF document text
    • http://datingdate.site/boris_akunin_the_winter_queenifs2y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fe8807b0da94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407782/normal_60073433b256d.pdfIn PDF document text
    • http://decideyouself.fun/androides_sonham_com_ovelhas_eltricas_gratisn00f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464534/normal_5fdfabe60c74d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402720/normal_5fc88c066366d.pdfIn PDF document text
    • http://copyrighthelp.info/completing_the_square_practice_problems_and_answersusb1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5fc8c718424b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_60237789d182e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fed3ed4eb56f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipikoz.epizy.com/bts_idol_music_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/anandam_movie_cinemavilla.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/43543009426.pdfIn PDF document text
    • http://pikazunelovo.epizy.com/centrales_electricas_jose_ramirez_vazquez.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_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 5348 bytes
SHA-256: 68dfb966e710e0bbd12be8ff9d4011512105eb24cae0f18e2e52d2824f1854ed
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 11284 bytes
SHA-256: 3a03bafd8e16c1b2ac7335d13c1df970f786e7fa05d67642db6f8e9ccb6a41c3

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