Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb61ecbf75d014e…

MALICIOUS

PDF

81.9 KB Created: 2021-03-10 15:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 57f4da38c1641f6b9f60e38495ea2092 SHA-1: 08075c40250a3f15d1f73e17cc52fc151db84d14 SHA-256: 9eb61ecbf75d014eb310a72e8b98bdf0bc54f598e04160cf758ebe29b26ac72d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to spreadsheet functions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://golowaki.ru/123?utm_term=spreadsheet+functions+explained PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/Q7UOEgh/2_player_games_free_online_fire_and_water.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/ifycUjh/60289037208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68241669-bd2b-4fc1-8a2c-f8e1e7f5940c/43304309168.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/manual_de_manuteno_citroen_c3_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/best_bootstrap_navbar_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/aftermath_population_zero.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/gigimadiruletosarumadedos.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/agenda_for_change_19_20.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/momafinuzotugodozavewow.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/xuwuwize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54ecc69-0b65-483c-bfd8-70ceef7b55e0/nesukakedamoba.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/pokusuwebik.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/lady_macbeth_2016_movie_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/21525444476.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/nixon_the_time_teller_minimal.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/16977642571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d689a02b-5064-43b8-b169-2f872e708e8d/aspire_cf_vv_battery_1600mah.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/gisamirodevud.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/44627138109.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bold_in_string_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/rajifemoxenupegewo.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/why_is_my_oil_furnace_not_igniting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eaf4012-cd7b-4013-9d2c-cd9ba20cf0ac/vemifuzaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec35f8f-7b07-4443-a2ba-5f292c154734/fishing_hook_knots_for_braid.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_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 5416 bytes
SHA-256: cef6a8aaa64b94156e2b252c5be95c19fc1560a27097af426dfc47afa9348235
font_01_sfnt_off00010965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10965 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000111f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F2 11968 bytes
SHA-256: 2d8104cdd38684b1835a5e94a28aace804f5eacfcaa4b8eb07760a6322612673

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