Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfaf38d3fae0d02…

MALICIOUS

PDF

75.8 KB Created: 2021-05-05 15:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 901991b5adce3bb33b1b10757d1cc62a SHA-1: 2d6b230230de145feeb7c2c88c7c4c110d102b5d SHA-256: fcfaf38d3fae0d0278a46dc8db1b388da82b80d163bda149bf281b12095b3161
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malicious content delivery scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search results, suggesting a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=30+best+keto+bread+recipes+uk
    • https://cdn-cms.f-static.net/uploads/4448343/normal_6059d3ab0acfd.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_600b461862d7c.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_6056ae06eb6a3.pdf
    • https://cdn.sqhk.co/dabebasavus/3yrFgfV/11974435379.pdf
    • https://cdn.sqhk.co/vemupanilow/8ichjge/56312511904.pdf
    • https://cdn.sqhk.co/woxezelej/XoifqPp/strike_fighters_modern_combat_mod_apk_unlimited_money.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fazujo/niravebado.pdf
    • http://lumalidik.atwebpages.com/reading_aloud_skills.pdf
    • http://nosawakudik.myartsonline.com/despacito_piano_notes.pdf
    • https://s3.amazonaws.com/xajowu/eagles_injury_report_vs_bears.pdf
    • http://xedavabawavela.onlinewebshop.net/english_alphabet_words.pdf
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_6482132fcdc442a88c084c1a02cf1dad.pdf?index=true
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_e1940f4a41344703b0cf378e6aeebab1.pdf?index=true
    • https://b3e719cc-30df-460f-a5cd-d2fa480fcfac.filesusr.com/ugd/b2b6a5_3077a7983cd841479fb8ad3dc94fdf86.pdf?index=true
    • https://s3.amazonaws.com/xepululejiwof/fabekevezejefufen.pdf
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_0bc7cf9ca3004b9297ab07f9d1a8495d.pdf?index=true
    • https://s3.amazonaws.com/fixararololu/22336561006.pdf
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_973154eb81634fe0ba9c4e79d7ec4f14.pdf?index=true
    • 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_off0000e98f.bin
1c10c18481580a65423e9b372a8a1d5674a92a3424bd057ac4a1d92dd83f6d95
pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5448 bytes
font_01_sfnt_off0000fc1a.bin
778db8873c8c4e929dd4d3a4348f5b836729a18661124691130bf0d8ae040aec
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 11296 bytes