Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bb02a717e4349e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 01:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbcbbad6160061873ccc99eeefa3d642 SHA-1: d2d7978c988454d8df7fc84ad4c23687735f6141 SHA-256: b6bb02a717e4349e8e358388e5f36073dd578f501ebfdca332964191164e0d03
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to link farms and potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, classifying it as a phishing or trojan PDF. The embedded URLs and the document's structure suggest it's designed to redirect users to harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=3.4+puzzle+time+answers+algebra+2
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/wotesimenimiko.pdf
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6041f0ef2dd3a.pdf
    • https://cdn-cms.f-static.net/uploads/4410953/normal_60485b9ca7fd7.pdf
    • http://lukiduxipapep.mywebcommunity.org/bigenimojatujazo.pdf
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6014ab16e8816.pdf
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/poworepe_watisafebifoke_golilunizeleroz.pdf
    • http://kefudepoduwudi.sportsontheweb.net/what_is_a_good_sat_score_for_11th_grade.pdf
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fffffa152b7a.pdf
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/menitukewakil.pdf
    • http://sakivometo.medianewsonline.com/accounts_payable_process_flow_chart.pdf
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/dadezosaxov_lipebok_medadujosujix.pdf
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/01e5d0.pdf
    • http://lodomujimujug.mywebcommunity.org/free_diary_of_a_wimpy_kid_audiobook.pdf
    • https://cdn-cms.f-static.net/uploads/4448110/normal_602efb1677a12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f882468c-9e7a-45ba-b1ec-507d409f989c/shadow_and_bone_netflix_twitter.pdf
    • https://s3.amazonaws.com/lulelepese/local_tv_stations_apk.pdf
    • https://s3.amazonaws.com/ragejufa/pozesawinaxetu.pdf
    • https://uploads.strikinglycdn.com/files/c2400f66-1441-467c-8a60-21b526bad357/simple_pencil_drawing_pictures_easy.pdf
    • https://s3.amazonaws.com/gazijewevan/3249434656.pdf
    • https://s3.amazonaws.com/sazixipame/bcbs_member_application_for_payment_consideration_form.pdf
    • https://uploads.strikinglycdn.com/files/5115fe52-236b-4adc-ac56-0835b0b8c570/lelipopubetifun.pdf
    • https://uploads.strikinglycdn.com/files/ece344c7-2374-4d84-adf7-5620fb2c872e/ratios_and_proportions_practice_worksheet_answers.pdf
    • https://s3.amazonaws.com/pazerogasarinu/bascom_avr_book.pdf
    • https://s3.amazonaws.com/libosokune/lobutetarofazupobib.pdf
    • https://s3.amazonaws.com/fisulefajow/63311692508.pdf
    • http://luxupuxud.myartsonline.com/gnostic_books.pdf
    • https://uploads.strikinglycdn.com/files/1b1bbc2c-02ca-4114-8b77-ef58394847ff/focusrite_scarlett_2i2_studio_3rd_generation_usb_interface_with_accessory_bundle.pdf
    • https://s3.amazonaws.com/mejados/saxon_math_course_3_written_practice_workbook.pdf
    • https://s3.amazonaws.com/tesasubawalozan/kafupinulewurefumevebev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76f.bin
90c59ed6a5b84aa577a33b3883f764d34cc492fbd398b5ba4e90ff67451faa73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 5740 bytes
font_01_sfnt_off0000fb08.bin
e807a77f264560e40f518a567e6b0b1dacd8731203bec3e39bf27eea5432df30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 11400 bytes

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