Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df5652a8284e0f7…

MALICIOUS

PDF

75.5 KB Created: 2021-03-30 06:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f919b74cea0aaf1dd391181cad9dffd SHA-1: 433c03ae6f89d40b71ce323c9987af7f0b07f4bc SHA-256: 4df5652a8284e0f7cb521278d18a6e74840a7042ab8bb78818fe609d88076e2b
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document. The presence of these indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/award?keyword=ben+ten+coloring+pages+pdf PDF link annotation
    • http://tujidal.mypressonline.com/using_apostrophes_worksheet.pdfIn PDF document text
    • http://lasleymarkt.ru/pofobojipukifejusodokubewlry9r.pdfIn PDF document text
    • http://usacreditreport.info/cerebral_cavernous_malformation_histologyfvptf.pdfIn PDF document text
    • http://alsamcctv.com/xipenufibozl82iu.pdfIn PDF document text
    • http://pop-marketplace.ru/how_to_remove_battery_from_ryobi_40v_leaf_blower6fu4k.pdfIn PDF document text
    • http://azules.ru/84374868894kjcbv.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/makixibawumebol/song_my_bestie_by_abochi.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/kovuki.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/foxeruxanakumuparatutoneb.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/toefl_grammar_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/matlab_subplot_horizontal_spacing.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/asuran_dhanush_bgm_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/hiren_boot_14._1_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57977347-e254-4dbb-9e00-bbdcad313cb3/jesus_at_the_center_songwriter.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/chemistry_lab_apparatus_names.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/reducing_fractions_to_lowest_terms_worksheets.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/primavera_p6_free_download_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52bbd9a2-0878-499e-858c-c0b532475cea/depozufoposujuta.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/endothermic_and_exothermic_lab_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fafdae3-2c42-4147-aa8a-e66584bf6b08/ferrari_458_italia_spider.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/freeze_alarm_fa-i-cca_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/akkada_ammayi_ikkada_abbayi_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/nidusovati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26219d3-58bd-4765-ab0f-5d99ed713f89/language_of_flowers_book_summary.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_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 5372 bytes
SHA-256: ffb795e527ceadc268129ee12f71f31f7422086d7f1f34eb74cd3f204b8289a1
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 10968 bytes
SHA-256: c9cb5e0617ebfe05ff90f2b5c44a25e7ddd5f140bf384b22c0b04416b8e4a375

Open this report in the interactive analyzer, or submit your own file for analysis.