Malicious PDF — malware analysis report

Static analysis result for SHA-256 285950f0b034c405…

MALICIOUS

PDF

518.3 KB Created: 2021-03-09 12:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6957bb21c67bdad6fba115517e7754a6 SHA-1: 2257906810adcb53d7d66038f3cf555789b1cac1 SHA-256: 285950f0b034c4051456d31fb7d35f13d88bb83c0954967dbbd027f2aa08be03
124 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL and is flagged by a machine learning classifier as malicious. The heuristic findings indicate the presence of external URIs and a callback phishing lure, suggesting a social engineering attempt. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9314

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/123?utm_term=aspen+guidebook+on+enteral+medication+administration PDF link annotation
    • http://katipef.medianewsonline.com/what_can_you_eat_for_breakfast_on_the_17_day_diet.pdfIn PDF document text
    • http://bugilinupapud.mygamesonline.org/94566466245.pdfIn PDF document text
    • http://reduslimitaly-official.site/37220031515nqm0s.pdfIn PDF document text
    • http://znakomstva18x.site/unconformity_geology_examplesgm50y.pdfIn PDF document text
    • http://beremoter.online/math_worksheets_for_fourth_graders_ppahi6.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/star_wars_knights_of_the_old_republic_pc_download_free_full_game.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/what_is_an_unloader_valve_on_a_pressure_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/9GLiieC/mimeb.pdfIn PDF document text
    • http://cosmeteca.com/field_hockey_training_programlpum1.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/taxexuwinuvex.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/agdjaUs/dudojutirixupigesasav.pdfIn PDF document text
    • https://cdn.sqhk.co/volinafi/ighdij2/51307905962.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/login_page_template_for_android_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/gAibXhj/90_s_music_hits_top_100_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotolag.epizy.com/xilefodabom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1428d2fd-425c-4df9-bf00-fb1cffbd3eb4/mozuzazobavut.pdfIn PDF document text
    • http://zodumokosijupe.epizy.com/general_to_specific_topic_examples.pdfIn PDF document text
    • http://zoxutudirufusoj.epizy.com/methods_of_performance_evaluation_in_hrm_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70174eb4-0181-414f-978a-046de19c482e/hp_deskjet_2546r_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df45499d-65bf-4960-97d0-73a62b730105/xubawat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d23da3a-c669-457f-ac11-827d04f12e6e/english_grammar_basic_notes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B241 5584 bytes
SHA-256: f101d15ef47f4ac65e5f429930eb899fabd8613d4cd5a2fb4835c9752393e4bf
font_01_sfnt_off0007c528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C528 13972 bytes
SHA-256: f9f0051370f9e762c4b14031e3ae0ecea7973961064cdfe9e12c86c73e98cd29
font_02_sfnt_off0007f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13E 16232 bytes
SHA-256: 719c88cc197a7ec486d17b4426835efdd9d76ca1bce2371290cd62ce127f8dec

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