Malicious PDF — malware analysis report

Static analysis result for SHA-256 78df368664b059e6…

MALICIOUS

PDF

80.1 KB Created: 2021-05-12 23:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ff2f675fde72df96cf2b5d3be4a43df SHA-1: ee6f9cd3017ce6d5146ecd9c0e158effea512469 SHA-256: 78df368664b059e6e04613d88ac92aac8ad896130a64d813be147dc5b15dd753
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates the document is designed to host a large number of external links, likely to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=fl+studio+mac+price
    • https://cdn.sqhk.co/fogunedevare/TjaXqAR/98060831908.pdf
    • https://cdn.sqhk.co/vafodagusun/jiudqWZ/sivutoluwakowetisom.pdf
    • http://7gusevshop.space/fenodagomapifewibu21his.pdf
    • http://greenbike.shop/kazojikogiwitibidceghj.pdf
    • http://sepukolobu.sportsontheweb.net/basic_commands_in_sql.pdf
    • http://ottics.ru/boy_cartoon_picturex1vuz.pdf
    • http://samettemiz.xyz/tarot_reading_for_beginnerswqw03.pdf
    • http://pollsexpert.com/1420048746ad7eb.pdf
    • http://fanutoragozogow.sportsontheweb.net/xijubuluse.pdf
    • http://dabukim.mygamesonline.org/par_excellence_synonyme_francais.pdf
    • http://mewudaguzexo.sportsontheweb.net/lab_attendant_result_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/latufenaw/converting_units_of_measurement_word_problems_worksheets.pdf
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_13de2de5d31245c2ab05c8835ddbd33a.pdf?index=true
    • https://s3.amazonaws.com/nademopor/44480670838.pdf
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_aa55b1c0e8344255bd91b36521578477.pdf?index=true
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_fdf9cbc3d2c340b480b3392623db88c1.pdf?index=true
    • https://s3.amazonaws.com/jenagubadopi/tft_item_guide_new_patch.pdf
    • https://s3.amazonaws.com/golepe/50852989845.pdf
    • http://dapilejebuvone.atwebpages.com/lufusila.pdf
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_0572afc6dcce4dae9bff06d7adc67d1b.pdf?index=true
    • https://s3.amazonaws.com/pesetufavo/fomisakidimowapizidope.pdf
    • https://s3.amazonaws.com/juliziwojatige/vowiredibetegadilizupude.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faad.bin
1e782d586309b6e0c26c9717cbd6e6052888a3640607e4a6c141346df598679b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 5176 bytes
font_01_sfnt_off00010c2b.bin
8547faef0ffc2fb1b1791ce2d25e8d7a1ecb57b5559509223a0e84ebc0aa9db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2B 11432 bytes

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