Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe516dc0b9de1f5…

MALICIOUS

PDF

73.0 KB Created: 2021-03-13 12:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 672b93bcfa9e4d7661a10e3ddf342171 SHA-1: 938d5e4b9dbc9770498294053e4b976c86c57faa SHA-256: cbe516dc0b9de1f5c28a94dbad184da556133f5ee45242560fdcc230810de303
134 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to a PDF file on a disposable hosting domain, suggests a phishing or malware distribution scheme. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://seumenha.ru/123?utm_term=thank+you+gift+tags+wedding+template PDF link annotation
    • http://flowerport.shop/motorola_cdm1250_programming_cable8imlh.pdfIn PDF document text
    • https://lobigemef.weebly.com/uploads/1/3/2/3/132303116/nulezoxoboditod.pdfIn PDF document text
    • http://lnstagramsecurity.net/vijadenojmxyt3.pdfIn PDF document text
    • http://aycotoro6.xyz/93666400170vdyy2.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/benufozinatoj.pdfIn PDF document text
    • http://fly-drive.online/subject_and_predicate_worksheet_grade_6gzi0f.pdfIn PDF document text
    • http://xtina.online/control_dc_motor_position_arduinohjf7j.pdfIn PDF document text
    • http://tryadasert.online/lujutixabiguvebibul7ktvq.pdfIn PDF document text
    • http://changely.club/best_self_help_books_for_anxiety_and_stressjmdb8.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/kofuwupofunuxaf.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/sezilofatixexo-jabexezebedinuj-muwat.pdfIn PDF document text
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/mosuseg.pdfIn PDF document text
    • http://raxaterov.iblogger.org/john_deere_l120_for_sale_uk.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/80417ad6-3dc5-402e-b703-884d3358d6c7/51384689395.pdfIn PDF document text
    • http://waratukujuzugij.epizy.com/samsung_nx_review.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/certificate_web_enrollment_no_templates_found.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2694ca1-8943-422a-83c4-e00b7269fad7/dasawumubozelepujun.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/bijetevijokipezafupafu.pdfIn PDF document text
    • http://dotutamuvubes.epizy.com/78346832415.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/how_to_work_a_sunbeam_heated_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cdc016-0182-4dbe-8ffd-66a08f799a2c/5_love_languages_acts_of_service_meaning.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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 5568 bytes
SHA-256: 8e8ac93edb6945e007d2df6fd3f9b137cf78687395a15f5c854f34ca11409389
font_01_sfnt_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 10824 bytes
SHA-256: 45a461cfbf661fd23af5e3d0e483b801e6b994e7119403c4951ca3acb0ee5435

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