Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5624786c13d9f5…

MALICIOUS

PDF

100.0 KB Created: 2021-05-26 04:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8dc2f20bc646ab4cb46f1c9768f302fe SHA-1: 9e8e75f4eef77e60a0291688f8679bfe4f2ba97d SHA-256: ad5624786c13d9f5f5be4efbc3043bd152e839eed3b83c4a62410d2ac6945d31
124 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gta+5+cheats+xbox+one+infinite+ammo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371025/normal_603cccf696520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_603b5301d657d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450145/normal_5fe81402c9d16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369638/normal_5febaf79e3f24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fcb9e1f8255a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fd9f96eeeddb.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/dudigonifu/alessandro_vilas_boas_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/how_to_earn_free_trx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265749ab-59bc-40db-a4a9-dbcf5e420cdc/britax_marathon_clicktight_max_height.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/investment_science_stanford.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/50071828943.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/33350401878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe2fee2-035c-46ed-999b-54853097d0a8/76637749710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c47b801-773f-42f4-9379-90f8f2357a0d/how_do_you_use_a_rug_doctor_carpet_shampooer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3ae0a4-abc0-4187-aebe-09e6026ea26a/japumudikexerenemadanino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6d29b8-b209-4868-81bf-0180bbf52a08/6621413126.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/ever_be_bethel_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317d3a10-ec22-4a59-b040-dc4653d6409b/what_are_the_principles_of_logical_positivism.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_off00014b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B49 5356 bytes
SHA-256: 3f596508b2a9c267c86799ccf2738a006cc6547a4cca157aacfb2b6df59142bc
font_01_sfnt_off00015d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D6E 11128 bytes
SHA-256: b8e20d4a847365664cb3037f74bbc43ea0e8827a5db653da9e2d21e85acd146e

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