Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22ace8c2dc806f8…

MALICIOUS

PDF

118.6 KB Created: 2021-02-20 07:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4f57ba3229c762ef97e970a391a22cf3 SHA-1: 5fabcf35ad8f962dbdfecc50ca358268c62df14f SHA-256: e22ace8c2dc806f87dfb0e02d24a8b3270e4a573d7be4bd0c3996910012e8a83
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this is a phishing or malicious document. While no scripts were explicitly extracted, the presence of numerous external URIs points towards a phishing or SEO manipulation attack pattern.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=amy+tan+mother+tongue+quotes PDF link annotation
    • https://cdn.sqhk.co/lexoxuxoluvi/jbih0Am/battle_angel_anime_series.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/6ab1866380d.pdfIn PDF document text
    • https://vurovovi.weebly.com/uploads/1/3/4/0/134040995/fuzezuzepu_wiwepowa_dizifowugev.pdfIn PDF document text
    • https://zakonuvuluj.weebly.com/uploads/1/3/5/9/135984705/tofikelepuzinuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/iaggRig/leremijuduxulofomexogos.pdfIn PDF document text
    • https://rezikixudagip.weebly.com/uploads/1/3/4/7/134746502/ridixotafade_lelowesu_fivapoge.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/gjjhchb/samurai_ii_vengeance_pc.pdfIn PDF document text
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/7867125.pdfIn PDF document text
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/2867733.pdfIn PDF document text
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/3994781.pdfIn PDF document text
    • https://rugabefek.weebly.com/uploads/1/3/0/7/130775918/2343968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_602a80ed12844.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/vuzufexarevima/kisavadipotumewojadeze.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/charminar_express_platform_number_in_hyderabad_deccan.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/certificado_de_origen_tlcan_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/drug_dossier_template.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18684 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00019678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19678 5284 bytes
SHA-256: 01f6b63ae5451b6563dcca97b78525e3887603ab8585e4aae6c1455d014f6e0c
font_02_sfnt_off0001a84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A84E 10736 bytes
SHA-256: c662a5806bef8607fbc4529b254e776b2acd0d774cd56b3bd0e985c346bfacf9

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