Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f60026ca01abfe…

MALICIOUS

PDF

69.5 KB Created: 2021-04-02 10:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3b01fcc7fd3b1919a3d1800b89a25d4 SHA-1: 8aef3e5f063edc730bceda165e68d665231b83a5 SHA-256: 20f60026ca01abfeb44a4cead87f45dac572d6a6e79bfb3ae6fa7a3818fe6264
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 0.9997

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://dugedepap.ru/strik?utm_term=yamaha+dtxplorer+battery+low PDF link annotation
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/batebufasoxi-vezagolopob-meruwipinix-tanikifarev.pdfIn PDF document text
    • http://jusibebobekig.iblogger.org/amit_goswami_livros.pdfIn PDF document text
    • http://lightly.store/english_placement_test_oxfordcrvpl.pdfIn PDF document text
    • https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/pisavaxi.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/c903417.pdfIn PDF document text
    • http://merekidade.22web.org/how_to_get_black_ice_r6.pdfIn PDF document text
    • http://lozhobelir.space/android_bufferedinputstream_to_byte_arraykfe26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tutapaxi/jikokawuna.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/iu_plagiarism_test_answers_quizlet.pdfIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_ead624e33fef495fa95dd08bca7dd8ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/litunux/how_to_answer_job_application_questions_online.pdfIn PDF document text
    • http://tirejazanapo.epizy.com/nawagasosusurisunoxokewi.pdfIn PDF document text
    • http://womogesupepup.epizy.com/8590925128.pdfIn PDF document text
    • https://eb7ae0bc-69c2-4833-8adb-ed465737bb77.filesusr.com/ugd/23493e_3b76c834be334f5386a92bb7c449603d.pdf?index=trueIn PDF document text
    • http://zuwididag.epizy.com/george_foreman_indoor_grill_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/free_customs_broker_exam_study_guide.pdfIn PDF document text
    • http://fujumel.rf.gd/android_update_sdk_command_line_accept_license.pdfIn PDF document text
    • http://kanabobexodu.epizy.com/how_to_use_ti-nspire_cx_calculator.pdfIn PDF document text
    • http://lajawul.epizy.com/98615653318.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/incognito_browsing_app_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E9 5016 bytes
SHA-256: 0d9e986d595869f5e8d56a099bdf551c32c419af8958f9c6fd1fd86e23431dfc
font_01_sfnt_off0000d70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 10504 bytes
SHA-256: fd71eab7f087aff2ddca01cb69a61ca8147ec9e7dd1d1c3586c3d892821419a0
font_02_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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