Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af9db19b2228505…

MALICIOUS

PDF

78.2 KB Created: 2021-02-23 10:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8b505cc74a6094ca874420ddb3875e3f SHA-1: 24640b502309d6324bc614b8efa8ac56bc22a472 SHA-256: 1af9db19b222850575fe579a9817cb5fb49885d22d909e9b8d48d0194cd0ec29
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain metadata related to product reviews, potentially as a lure.

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://baarspo.ru/strik?utm_term=hamilton+beach+air+fryer+toaster+oven+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375195/normal_5ffea439bd1ab.pdfIn PDF document text
    • http://creditactive.info/tewodazusothgkbj.pdfIn PDF document text
    • http://fishland.store/xonix_watches_gamelsrf2.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/2ih2mjc/shopping_list_buy_me_a_pie_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_6003a164c5220.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/inner_sea_world_guide_reviewpk795.pdfIn PDF document text
    • http://clubstore.info/51310506055ykupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376096/normal_60065f709cd92.pdfIn PDF document text
    • http://pomanonorajalam.22web.org/ebay_uk_sales_reports.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5ffe86c8a78eb.pdfIn PDF document text
    • http://allfreebets.ru/analyzing_likert_scale_data_in_spssm92rp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_6025cb1f10ab7.pdfIn PDF document text
    • http://repair-foto.ru/what_to_do_in_the_first_90_days_as_a_new_manageriom78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_60079ce0c44f2.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/dhiiA1z/moto_x3m_bike_race_game_y8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_60067f98db7e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5476 bytes
SHA-256: 3adf8def036de179fa48f7e06b690b76054ea4dbd4afac52c78018f6703bdf4d
font_01_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 11504 bytes
SHA-256: 874578376666610c1b4f3eef927126d170748c443c9635e9f765dda6f882998a

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