Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b62705fc8c69c04…

MALICIOUS

PDF

77.8 KB Created: 2021-04-10 00:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9769d5f2a3669ec0f53a2eb15cc23995 SHA-1: eabb8ce7b558914c85ff3bd7c172a7ceea6e891d SHA-256: 5b62705fc8c69c04aab1eb90acb6af8d59309cf4a85e6f9e8e11b4a55875a438
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with a primary suspicious URL being https://soxebez.ru/strik, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates the document's purpose is to redirect users to various external sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=lesson+8.2+skills+practice+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473954/normal_60241a694c250.pdfIn PDF document text
    • http://vurapajojijare.22web.org/can_i_buy_a_ham_radio_without_a_license.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/hohaGyy/monaxuremibuguvapilozib.pdfIn PDF document text
    • http://mikapamaku.22web.org/curar_el_bruxismo_de_forma_natural.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/Vochbhg/alien_shooter_campaign_2_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_6016b5c91ebed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5ff037e443dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_60294cdf21072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60515df79fbf4.pdfIn PDF document text
    • http://minuzozudutaji.iblogger.org/aviation_merit_badge_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/iaRgjdB/plan_controlado_telcel_249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuverojipu.rf.gd/gagiguzugasasinuzozutivov.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/28573755009.pdfIn PDF document text
    • http://dubanexotokegel.myartsonline.com/60804601191.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/lotexulivasolaxaxomuxi.pdfIn PDF document text
    • http://banezisiwirasu.rf.gd/hp_laserjet_professional_m1212nf_mfp_troubleshooting.pdfIn PDF document text
    • http://vupafigimewex.rf.gd/32156268043.pdfIn PDF document text
    • http://lumaradidufil.epizy.com/93884453969.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/95472225632.pdfIn PDF document text
    • http://foxinojale.epizy.com/arbys_value_menu_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/xodidumomiku.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/critical_path_method_calculation.pdfIn PDF document text
    • http://refofigeto.epizy.com/comic_books_for_15_year_olds.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/feet_to_meter_conversion.pdfIn PDF document text
    • http://tebuwujovu.rf.gd/applied_ballistics_for_long_range_shooting_3rd_edition.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_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 5380 bytes
SHA-256: 657e3ad83a9b71c23e633519590ba267144c895a31dcf93b360042692e6622c6
font_01_sfnt_off00010623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10623 10368 bytes
SHA-256: d26e88352549e7cbf860ec3f7fafdeb3646fbbf4ca24acd28592cb8c28f05f25

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