Malicious PDF — malware analysis report

Static analysis result for SHA-256 8111b50112541271…

MALICIOUS

PDF

71.3 KB Created: 2021-02-17 16:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ee49130da666f6547d02b3daf7f4093 SHA-1: d8ac22e299235b3bb005392b0b26d664d9396787 SHA-256: 8111b50112541271222d31023667799bfa966ce4983a543569a47f5b6690f48b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'free pdf' and the authoring application 'wkhtmltopdf', indicating a lure for users seeking content. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest an attempt to redirect users to a malicious site.

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://leonvi.ru/wix?keyword=the+family+romanov+free+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5ff21f75cfc1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_601786425d3aa.pdfIn PDF document text
    • http://opros.xyz/transformare_din_cm_in_inchc3n2t.pdfIn PDF document text
    • http://xelirap.22web.org/best_cycling_app_android_wear.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474989/normal_600641922a51a.pdfIn PDF document text
    • http://ketorebagibof.22web.org/42254800482.pdfIn PDF document text
    • http://creditactive.info/zoralumapupicakpt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6013bbdb1ca93.pdfIn PDF document text
    • http://itasummer.fun/best_customer_service_interview_questions_and_answerskfxbz.pdfIn PDF document text
    • http://fuwonetuj.22web.org/pemedamixaku.pdfIn PDF document text
    • http://xezupotivevilib.22web.org/4246337436.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/fstU61Y/zdf_live_stream_zdf_livestream.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/cidNjjN/54315392894.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/xozeb/17194968225.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/34310338751.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/buona_chopped_salad_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/zusekipevedotirixetetepul.pdfIn PDF document text
    • http://fabonek.rf.gd/76194329900.pdfIn PDF document text
    • http://kiroxivox.epizy.com/can_t_edit_spreadsheet_in_google_drive.pdfIn PDF document text
    • http://vivimaga.epizy.com/after_effects_logo_intro_template_free.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_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 5216 bytes
SHA-256: dce1725f41cfc9b2aece870f026c667aa7926974b73d88d73b9650f03c6720db
font_01_sfnt_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 10620 bytes
SHA-256: 521f56471b70a3cde0bdf2d84b1f6c78697a7d95ae0b05f7076858e5c4f95b85

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