Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdd2dd12df75bbb…

MALICIOUS

PDF

86.9 KB Created: 2021-01-23 09:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09d9f0fd1744cc35689ece1e530e1c04 SHA-1: 932627d7ad77acf9998688a5730c160e31236785 SHA-256: 1bdd2dd12df75bbb848d100c8baada98a026f123611b5c64b52452ad4f2e37c8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wb?keyword=nodding%20dog%20for%20car%20dashboard'. This URL is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the embedded URL is sufficient to indicate a phishing or malware distribution 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wb?keyword=nodding%20dog%20for%20car%20dashboard In PDF document text
    • https://cdn.sqhk.co/vekasurox/u5heijl/dungeons_and_dragons_online_worth_playing_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366397/normal_5ff3e6be1bc41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_6001478642e2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375355/normal_6006e1ee8d379.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/ihc2jjb/vida_sana_saludable_consejos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_600a92b72a9cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419832/normal_5ff5333f201c1.pdfIn PDF document text
    • https://cdn.sqhk.co/jadosoxiko/ifzH1i4/huey_magoos_loganville_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/fG3Aje6/brothers_in_arms_3_hack_apk_data.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378381/normal_5ff3655203935.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5ff82893df0f6.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/lorugipopuxe/clabsi_guidelines_2016_idsa.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/introducing_verbs_reported_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/93412140277.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/tuwowis.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/ab_initio_ib_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ulcera_aftosa_recurrente.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/bwssb_name_transfer_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/77484861081.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/btec_applied_science_level_3_book.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_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 5360 bytes
SHA-256: ae2f2b97940748abb19b13676c64193b8350b9da8ec35d3c5e00bbae07d3dcea
font_01_sfnt_off0001294d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294D 10936 bytes
SHA-256: cb7da9929eb7953390c49625b580f7641327bfb25f31d7d63379498051754546

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