Malicious PDF — malware analysis report

Static analysis result for SHA-256 27648c3621e2cba8…

MALICIOUS

PDF

119.0 KB Created: 2021-05-22 03:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b41ac7beb1d0d94e48744e537df92b08 SHA-1: abb0e37d24d892f432198a48adb635fd3b187749 SHA-256: 27648c3621e2cba8f49cf8be86b794773d12f184f08700fcba97127c81faf4c8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=frases+celebres+a+orillas+del+rio+piedra+me+sente+y+llore PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451762/normal_602f90af70e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_604af31acb61d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_6021c4a2c71cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_604b1e2b29517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_602922ef1034b.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/sitok/ledafinerazozerek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e975177-cdd8-4dee-816b-a49a371dd4bf/fuvepikutojibis.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/batasixowur.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/24055384654.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/87644541799.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/vocabulary_workshop_level_c_unit_12_synonyms_and_antonyms_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad866f4d-16b0-46cc-b9c3-b0136a332bc9/2006_club_car_precedent_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/what_is_my_sun_sign_in_vedic_astrology.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/44224864168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db411c2-b7cf-4425-960f-fc8a112cdf77/supersonic_32_led_hdtv_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf1b04d-d452-4f67-babd-3c59692ce0f1/dokigamilitujovajol.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/34737045687.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/beginning_fingerstyle_blues_guitar_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/roku_express_screen_mirroring_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/epic_conways_game_of_life_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/brawl_stars_ios.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_off00017e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E9F 5204 bytes
SHA-256: 6110b20377eff7d57d706665471b1368c061cf690f92f2acf5fe0794e693b9cb
font_01_sfnt_off00019026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19026 14304 bytes
SHA-256: 132a884070e6cd09ed872152be6cae75faa05d3549519d07f19bd195700d7184
font_02_sfnt_off0001bd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD22 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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