Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb24de918c1e0518…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 13:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ce3a51fac69474b45ffe90667647f17 SHA-1: d7e52ac2a47bde0479494685ad4acc427afa2dfd SHA-256: cb24de918c1e05185f2780ce8a869a038bccc24f593612fff136850faf087433
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=here+i+am+lord+bible+verse PDF link annotation
    • http://healthyforczechrepublic.site/coleman_saluspa_4_person_square_inflatable_outdoor_hot_tubbvujc.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/iMhjgju/happy_wheels_demo_tyrone_s_unblocked_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fce70cb7f23a.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/pWjjgfV/calling_bts_prank_video_call.pdfIn PDF document text
    • http://yoga-fitness.space/34837581072lqv14.pdfIn PDF document text
    • https://cdn.sqhk.co/duromivap/2CbjixY/wobibege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ffc49f23528d.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/Ribjfhh/72911168850.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/X9ghiiw/minecraft_bedrock_small_world_seeds.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/xalasawu/5200254428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d558be-9bde-412c-af6c-d1e20ed00034/amazon_prime_video_subscription_cancel.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/sarozowaxibixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f42a795-10a5-4d12-9dd8-409d4b122e9b/24524759658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a82226-ba01-4d24-a10d-5bd23095b340/le_petit_nicolas_book_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd677519-30ac-4cae-8af8-29f179016d86/gujuvokasarivule.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/don_t_worry_be_happy_tamil_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0eaf20f-bec1-40f7-987b-2d6d6e0dcf03/pdf_animal_farm_chapter_6.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_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5132 bytes
SHA-256: 4e20d3aac3a6453253c8fd1742f69540bd1510562e1a0b9920d65f5336ecee07
font_01_sfnt_off0000fb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8E 11252 bytes
SHA-256: a937837f012b33f26817b2969b97daee6f252077b5562e31aec8842464309676

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