Malicious PDF — malware analysis report

Static analysis result for SHA-256 f228cd11bc3d740d…

MALICIOUS

PDF

72.4 KB Created: 2021-04-08 06:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0b2c1d55b605a542e29b0f1cdb8918ff SHA-1: b0cfc5497a024ef8b682cbf0b5c84dad278c3f6a SHA-256: f228cd11bc3d740dfe4c5d8af05a44635c24b29173853ae75abd0765cc16b548
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to fokemale.ru, which is likely a phishing lure. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest the PDF is designed to redirect users to malicious content, potentially a phishing page or a further payload download.

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://fokemale.ru/123?utm_term=dr+jamal+badawi+books+pdf PDF link annotation
    • https://cdn.sqhk.co/ronofumito/d3hdhjU/pick_me_up_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/LrNmihU/79991664326.pdfIn PDF document text
    • http://vixojejuzata.iblogger.org/zosyn_davis.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/e0jmidR/juxebetak.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/62556678350.pdfIn PDF document text
    • http://shoop-ff.ru/89364435771l0e2h.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/how_strong_can_calisthenics_make_you.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/analytical_chemistry_7th_edition.pdfIn PDF document text
    • http://bcipreactivaperu.com/88383512928c4qom.pdfIn PDF document text
    • http://goodsun.space/o_que__o_que__piadas_infantilj3s27.pdfIn PDF document text
    • http://pijojavoto.mygamesonline.org/3231008472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_8bf96283dc4d450b8028c3550e435758.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/how_to_clean_hp_6700_printhead.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/bapugu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/frozen_movie_in_tamilyogi.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_8cc662e4690d430ca41bb670a850b7bb.pdf?index=trueIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_0e8caa4b387948cd8d1c9d08fd4cd050.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/ethics_by_baruch_spinoza.pdfIn PDF document text
    • http://bumitorazefi.epizy.com/classroom_objects_esl.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_off0000dca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 5560 bytes
SHA-256: b795d62ebd8601c2ead7fe28b29076ab3fd3ebbd2e8ea21ef661ce4a9d79fce1
font_01_sfnt_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 10936 bytes
SHA-256: ec82703cbbd144af2ca8470cefab13f5be712b7220a134a3926ee6434a9a7a27

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