Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b59e99d0a93838a…

MALICIOUS

PDF

69.3 KB Created: 2021-04-01 20:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c0dbfad6948c10b08410547595eb3321 SHA-1: 53491f850072d2ab42dd18f644b6c45eeea74a60 SHA-256: 9b59e99d0a93838a57fef00bfbfcf6b1743b8534ee95491cb2e1f8330352065f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=cosco+simple+fold+high+chair+replacement+parts PDF link annotation
    • http://keniworu.mywebcommunity.org/jekelopipujutule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_6024545ccf241.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/letter_writing_format_in_english_formal_and_informal.pdfIn PDF document text
    • http://fupomogusi.22web.org/15314536995.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/kinadajegorebiwut.pdfIn PDF document text
    • http://jegotaraxipux.iblogger.org/25320841246.pdfIn PDF document text
    • https://gaduforijap.weebly.com/uploads/1/3/1/3/131381464/vawiwopekid-gilenopiken.pdfIn PDF document text
    • https://daxuvinu.weebly.com/uploads/1/3/2/6/132695190/mutodutolosezajus.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/3e8058f57f0c5.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/wahl_clipper_elite_pro_high_performance_hair_clipper.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/beginner_russian_textbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fddb5549fd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_6060d41314b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_6056ce0f74ffe.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/vapite/31751450975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16186db3-13bc-4e57-a2cb-f458b2d5b6a4/texuvufemes.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/gradable_and_strong_adjectives_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b1b680-4775-47a8-97d6-4c392268e1bc/14740199970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b458d8-5cf7-43ae-a6d7-63b86e9e2ab6/77611457812.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/tamil_daily_sheet_calendar_november_2019.pdfIn PDF document text
    • http://zagebixomibolo.rf.gd/highland_cathedral_organ_sheet.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_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 5476 bytes
SHA-256: e65ac4a0e06b5102e7805b53d0125a39cc6157ec29b00b88777423044aa96ea4
font_01_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 10208 bytes
SHA-256: 77c9fc82baf9231d30c6ec5cfb2287d27509e102ae4e9f9d48fd896b1bdc08d0

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