Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b0268d63106c85…

MALICIOUS

PDF

85.2 KB Created: 2021-03-01 18:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5c238a4c01c351e19460dd2968a7c0e8 SHA-1: 7ef1aba4d10038a35202c6ab166cb6220a814f3b SHA-256: 38b0268d63106c856a490c33e945883168524b73bd7d3998360a6678a34edec0
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it functions as a lure to external malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic of using many links on disposable hosting to obscure the true destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=psychology+ciccarelli+5th+edition+answer+key PDF link annotation
    • https://cdn.sqhk.co/zovaratigu/bphegiN/shelter_logic_garage_amazon.pdfIn PDF document text
    • http://xojetupamowub.iblogger.org/dante_alighieri_divine_comedy_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/ggnihhd/83002478865.pdfIn PDF document text
    • http://edaeda.moscow/hermle_quartz_clock_movements_uk27mgi.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/ie6gigf/jusobibovilipogaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/hic9gcH/v_mobile_ksa.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/Sxjdkif/44323979640.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hhhhp77/78136618988.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/ghiaGhf/mexefidanogerumag.pdfIn PDF document text
    • http://socialwave.me/vowiradebadubesutawaroklcg.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/cg1YCvw/guess_the_band_picture_quiz_answers.pdfIn PDF document text
    • http://donbetosstreettacos.com/memorandum_template_philippinesxs550.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/b363tMV/lucky_block_race_map_download_1._16._1.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/jdYvgfZ/are_you_sure_button_vba.pdfIn PDF document text
    • http://ewop.space/xekakrwdqu.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/novipaliwid/xudunorezatabipeb.pdfIn PDF document text
    • http://resizov.rf.gd/microsoft_access_2010_requires_visual_basic_for_applications.pdfIn PDF document text
    • http://gasigigi.rf.gd/telephone_answering_service_costs.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_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 5584 bytes
SHA-256: db46d04ab4cc582c842dcd2971cce400040f2d8f2192c5c80bd9549a8eb867df
font_01_sfnt_off000119fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 13588 bytes
SHA-256: cbf02bb27ac3bc2c46f44a96cd679de96465abd0299d10b56527241cc139fb79

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