Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2163bfb2ae7fe8…

MALICIOUS

PDF

69.0 KB Created: 2021-03-18 00:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f5a303bfecb9f703c558023f4d392ba SHA-1: a02b333e5da541f14e3629865ab15c5fabfe9b59 SHA-256: 2a2163bfb2ae7fe8d16656dcc018f51f43766904fde47dc10e5111ace80a086e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with one prominent link pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a strategy to generate traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=cakephp+tutorial+pdf+fran%25C3%25A7ais PDF link annotation
    • http://zifixoribe.scienceontheweb.net/certificado_medico_cdmx.pdfIn PDF document text
    • http://kukushpa.fun/99787031440y5ws4.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/how_to_get_the_angle_of_an_isosceles_triangle.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/sat_math_score_percentiles_2018.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/how_much_does_it_cost_to_repair_a_catalytic_converter.pdfIn PDF document text
    • http://sun-italy.space/book_review_how_to_get_filthy_rich_in_rising_asia00f8m.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/zizene/html_css_bootstrap_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/31999838686.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_336cf5097aee41c0a74445b2c418633a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/mandatory_reporting_qld_elderly.pdfIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_9d28c63479ce4a708c07e401fd4bae8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/masevewi/gidamugixinol.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_4142fc4bb0384989bcb8190a5911147e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/comparing_numbers_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/budget_app_android_plan.pdfIn PDF document text
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_6e487a790fcb4bf78553544fe5ccf442.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/facebook_ads_manager_tutorial.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_c3027c490ab9464897486037a097dcc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/gevoxefuloratata.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_c44b11a525944f98b7f9eae9e93523b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/the_mortal_instruments_book_set_chapters.pdfIn PDF document text
    • https://e8802323-0824-40c5-8a58-19d700e27586.filesusr.com/ugd/50cafd_560ff37f012b440aa84efadc89ef277b.pdf?index=trueIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_d7890d7c2d424b5493fb458906439d5c.pdf?index=trueIn 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_off0000cc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5B 5280 bytes
SHA-256: f7ce8bb59464d35ea60c269b24abbddee377a83e95a2142620d929f60a51045d
font_01_sfnt_off0000de4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 11668 bytes
SHA-256: 1cb2f785d28f4f37867a87362346f0fd2344bae70a34c47369050f8432f39c01

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