Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3c1dcdfb70acf7…

MALICIOUS

PDF

84.0 KB Created: 2021-02-13 01:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a44bcfd5cce63dc06cc6bb8a76f77217 SHA-1: ff187fb6a4fed02294717d5ee9787c11b05c302e SHA-256: bd3c1dcdfb70acf73e4df38d26e42e9be3aaf81153db1694f5b23c71639a1995
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded URLs suggest it is used as a lure, potentially for spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=expert+power+battery PDF link annotation
    • https://cdn.sqhk.co/suwajipox/cF1AlKO/indoor_rock_climbing_near_me_open.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/4jcnhdA/world_war_iii_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vepefilome/JFcijjh/snow_drift_car_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/vfheJha/vavavigitokixep.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/s2NgMjj/oliver_the_virtual_cat_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/rchgAha/fox_winged_eyeliner.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/iiifNPt/airbnb_stockton_nj.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/rezugekolaba/abcd_2_movie_song_chunar.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/wekiluvovelasu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/still_blessed_the_perrys_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/97652370217.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/badla_movie_song_pagalworld_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/bangla_dictionary_java_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/2019_tamil_dubbed_movies_marina_rockers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/24957535931.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ielts_reading_practice_test_with_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/prueba_de_coombs_indirecto.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/48078791619.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/bike_race_hack_free_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_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 4596 bytes
SHA-256: 3cd566ce4f2fff178f6e19f5dc9660af844d513c0e55b0f8d4326f2d07528b5b
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11532 bytes
SHA-256: 03a221ebe36f1fb8c9acaddd6a87495a4af525a0a41b87814362afa879a7cd0d
font_02_sfnt_off000134bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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