Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d81dac28aca887…

MALICIOUS

PDF

87.8 KB Created: 2021-04-03 20:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f05e093675ce8e2194ec64d0a0b4ffd0 SHA-1: 73e5553e1f81308132f457760ac8ab5061d14733 SHA-256: 09d81dac28aca88730fc51a6cd2bb727c04008222442ced7e67735a356475a09
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/strik?utm_term=sigmund+freud+dream+meanings PDF link annotation
    • https://cdn.sqhk.co/kazamepa/jRLiehj/37996768359.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/pOfijhd/path_through_the_forest_meaning.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/cabelas_80-liter_commercial_food_dehydrator_reviews.pdfIn PDF document text
    • http://baditunabupiru.mywebcommunity.org/geometric_transformations_iii_yaglom.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/present_perfect_simple_past_exercises.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/jagitofaj.pdfIn PDF document text
    • http://saduzemed.mypressonline.com/bookmark_template_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/FCRhalD/61315418252.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/gfimXEa/youth_basketball_training_equipment_dribbling.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/factor_analysis_and_cluster_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_1257feb806ca4ec69524ac0a89f13bab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/what_happens_if_you_lose_your_gold_password_on_ipad.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_aa85e286b12e48118c57a92808ef4835.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/do_you_have_to_pay_for_disney_college_program.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/test_de_inteligencias_mltiples_para_adolescentes_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/swann_wifi_camera_review.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_ae640ccf66be4ea1847d128ab843223b.pdf?index=trueIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/evangelismo_infantil.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_241591922dc845d1a26d71694d57957f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuzakob/rojabowunematiwe.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_off000118ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118ED 5296 bytes
SHA-256: c9d819ae5a57f02dbbc9156cc77270b9e91e5504af363259279a02d772a63195
font_01_sfnt_off00012ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD9 11692 bytes
SHA-256: 43318c2ef7bd6bb152965064599a5c89dec044509ff59d0aefc7972fcd9e4071

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