Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdbeb43bd281397…

MALICIOUS

PDF

76.4 KB Created: 2021-01-30 13:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a33ff510407d0720f6a1b9aba676a4f7 SHA-1: 980ae17327358fa5e5e40dc931352e671a1ec7b9 SHA-256: 6bdbeb43bd2813971b511a33be61ed3e60c592f217921d90cbc0896b946b6c35
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a search query, further supporting a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=where+does+aerobic+respiration+occur+in+eukaryotic+cells PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5ff4cc5265c97.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ji2iejb/arrow_warehouse_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/hTjaou6/find_words_in_a_picture_game.pdfIn PDF document text
    • http://batmbatm.ru/gapivasokal3djbx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_600f72f846bdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461523/normal_60011bd11e363.pdfIn PDF document text
    • https://cdn.sqhk.co/woxutonezem/hdheHi9/88050632746.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/jcAgjlT/comedy_central_south_park_season_24_episode_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/hdgVvWU/talking_dog_movie_90s.pdfIn PDF document text
    • http://stav-games.ru/sukedefegapagagatoxinovokiky85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_601457723f04f.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/ge2hcji/cars_toon_tokyo_mater_korean_end_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5fc9997ad5b65.pdfIn PDF document text
    • http://lumacy.site/43930679803i5ze9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_6004be0f32571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disefubukub.rf.gd/32246451076.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_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 5480 bytes
SHA-256: aacf49f41f35e3e8d8fbb5b5f9dc728fe9ea2b70e3c8e953ed4907bbdae0ca83
font_01_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 11092 bytes
SHA-256: d8b76a71289b14a769d9f27a44a2540cc4acbd4e6a2929e6d0ece8ae9e64dfcb

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