Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68f974304b2d01c…

MALICIOUS

PDF

72.5 KB Created: 2021-03-03 01:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8d0bfbd3d8d4bf8d8dd980f8740cfa91 SHA-1: 78d7deb7f55940821c93d30a44843796291c2077 SHA-256: a68f974304b2d01c48d04fa677deb0280c98fec583be4ee23a80fc8d7935194d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Sherlock Holmes books chronology'. No scripts were extracted, but the presence of an external URI points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=sherlock+holmes+books+chronology PDF link annotation
    • http://mon-cmb.best/nhl_network_live_stream_freez8rjm.pdfIn PDF document text
    • http://fuwenosod.iblogger.org/rukagiwuvaxawuzije.pdfIn PDF document text
    • http://zujakupuk.22web.org/white_chiffon_blouse_formal.pdfIn PDF document text
    • http://dasukegejiwav.iblogger.org/evil_within_2_weapons_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofepiropi.onlinewebshop.net/star_wars_age_of_rebellion_classes.pdfIn PDF document text
    • http://kijurisotam.epizy.com/sijuwosizopujovijaza.pdfIn PDF document text
    • http://xafiwufol.epizy.com/30181571156.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/bodoni_std_bold_condensed_free.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/chrome_for_linux_mint_17._2.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/what_is_family_sociology_perspective.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/zixalewijibigezib.pdfIn PDF document text
    • http://zapavuvezozetet.epizy.com/37106018760.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/27719124780.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/59982024532.pdfIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/wurizipo.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/endo_vs_exo_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/sample_cocktail_menu_template.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_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 5412 bytes
SHA-256: 87c7a96a0aa794794c3ddc00606e8e5711f497c6ba6cd07e251d4a8066308931
font_01_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 10316 bytes
SHA-256: fcd47f7c54655a1abe46fdfbef9be0486a95b17567f6105ba775ae138cbac2d5

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