Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3b0c644ed8cabd…

MALICIOUS

PDF

67.0 KB Created: 2021-03-14 00:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 19f2b038580509994012e03a7b03df9f SHA-1: 27d7c8f5662919fba24aa06740eb7b69c6d65bdb SHA-256: 6f3b0c644ed8cabde09152f10ce101c25efcd0ccd468d55a94b6acb96e5c18a1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'fokemale.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://fokemale.ru/award?keyword=pediatric+advanced+life+support+pals+pocket+reference+card+pdf PDF link annotation
    • http://siondez.ru/fupomorexizad5x3k.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/JCVyTid/how_to_play_games_on_houseparty_online.pdfIn PDF document text
    • http://khareedforosh.com/gepevurajaladefuguwf371.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/how_do_i_use_the_steam_cycle_on_my_lg_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/gq8DhbN/nokefezefapuxuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/8gjwijd/74783495410.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/1923285559.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/dif9jbr/carrom_rules_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/3Oibe5N/crime_bot_mod_apk.pdfIn PDF document text
    • http://betmoy57.com/lg_wm3997hwa_dry_only41tnz.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/fomudebipefasu/i_am_a_church_member_chapter_5_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kefur.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/tuv_rheinland_iso_9001_logo_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/muvefebuxudix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c859ad6d-08de-4702-9d4e-b7a61cfb2c56/duzitabasip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f2c484-69cb-4e3f-9fce-6b834829f372/togonidimuxiwawejojewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ad6b1b-78ac-47af-b1ac-1a8838ab8a85/ripogomeme.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/lunefagakikazapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c41644-92aa-4cc0-97c4-6ae23207b75b/roald_dahl_the_twits_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5246a692-85aa-485c-9834-aec7154fb43b/como_convertir_pulgadas_a_centimetros_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7198cf6-083b-4e2b-8e43-61b772993262/lexubutaxox.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_off0000c882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC882 5276 bytes
SHA-256: 5ab81c1b13fe8907dc395eee505ca195201e091a2f1d44c7e590e8b619473307
font_01_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 10600 bytes
SHA-256: 87214305a35860a960c495f17765c59cde7c5cf098c99abb7938fdd1aae1c45e

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