Malicious PDF — malware analysis report

Static analysis result for SHA-256 710984736f1d0247…

MALICIOUS

PDF

85.4 KB Created: 2021-02-17 20:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6381359e26fb6ce56d6f7c7eaa5d6ee0 SHA-1: 539f226475dc7f20e6f88b1a3783e5f222720050 SHA-256: 710984736f1d0247d51b06503d0f714986a4815ff21713574a8711f38eedc661
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content manipulation tactic. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URL points to a site that appears to be a lure for educational content, likely a phishing or scam pretext.

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://jottigo.ru/wb?keyword=hundreds%20chart%20game%20for%20kindergarten PDF link annotation
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/genozetanawu-tatixajanim-wenikixigoripes.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/KfQmgf6/mindshift_backlight_26l_vs_lowepro.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/6CzibpA/juego_de_drones_en_espanol_pelicula_completa.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ixpgjak/wagopunew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_602c9ef6da7c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fe4ac40aa1ea.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/4bb2462f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_601840c8119fa.pdfIn PDF document text
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/wavoximu_jobusopok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5fd24b057f552.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5fcb06047cee4.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/4610538.pdfIn PDF document text
    • https://cdn.sqhk.co/bomagomax/hakDhdZ/toolbox_talks_topics_spanish_and_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bubodeliza/31448963595.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/kivobebaxir.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/rupiseka.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/trumpet_voluntary_clarke_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/report_lost_drivers_license_singapore.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 5308 bytes
SHA-256: e2097d484fd227605cb8ac648a68932aa4a63f0c65109dc07bcdd310d5ca2b02
font_01_sfnt_off0001128e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128E 11572 bytes
SHA-256: 649104cc9222c88bf5e62c8febd1ba2cc75752336a9e0a59e5a31dcd174d2aff
font_02_sfnt_off00013a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.