Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc4b91ca461f6bf…

MALICIOUS

PDF

93.5 KB Created: 2021-03-25 04:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c907caaeaa302c54f173dde0ae974ef4 SHA-1: d5bc3a41963f8faa78edbb8a9a5ccefa00d9e458 SHA-256: 9cc4b91ca461f6bfab29fcc9931fb474734b8891dd036d3af82429ff8a857bc0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://vilenefex.ru/strik?utm_term=bhagavad+gita+online+telugu+pdf
    • http://fartook.online/agenda_2020_em_para_imprimir1qnzs.pdf
    • https://static.s123-cdn-static.com/uploads/4479445/normal_6006a5e8d13b8.pdf
    • https://cdn-cms.f-static.net/uploads/4488804/normal_602693667a524.pdf
    • http://wegaturagifo.getenjoyment.net/beehive_english_book_class_9_free_download.pdf
    • https://cdn.sqhk.co/medujebukoma/icheial/31031990687.pdf
    • https://static.s123-cdn-static.com/uploads/4445869/normal_6001cd2c2aa76.pdf
    • https://cdn-cms.f-static.net/uploads/4447885/normal_6016c9387a224.pdf
    • http://insurancesouk.com/adpro_lite_softwarep55pk.pdf
    • https://cdn.sqhk.co/bopelara/haAdIji/chief_financial_officer_jobs_houston_tx.pdf
    • https://cdn.sqhk.co/naliwanik/hiiHRF3/23111011476.pdf
    • http://cooldomen.space/the_bent_rod_is_supported_at_a_b_and_c_by_smooth_journal_bearings._compute_the_x_y_z_components6otuq.pdf
    • http://excschool.ru/arijit_singh_all_songs_download_mp3ld8mh.pdf
    • http://warajuvevuv.medianewsonline.com/30368343724.pdf
    • http://mobufuwiwid.medianewsonline.com/shellfish_recipes.pdf
    • https://cdn.sqhk.co/jesotipo/cgdDTih/79760798786.pdf
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60563be5eae70.pdf
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/fivuxerozexogat-rujekikari-pepituvetijozu-matefodu.pdf
    • https://cdn.sqhk.co/zaviresodew/cWdgdjK/value_proposition_canvas_template_ppt_download.pdf
    • http://bukuminuwakub.mypressonline.com/bentall_surgery.pdf
    • http://iglivesupportteam.com/mandiant_apt1_report_summaryyx3x6.pdf
    • https://webesetumisurut.weebly.com/uploads/1/3/4/3/134318687/sumopamiri-josepazarugel-rosuxozeto.pdf
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/4e972ccd40.pdf
    • https://gomepenet.weebly.com/uploads/1/3/0/8/130874128/vojakojozogul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tobojelusiwi/8979040557.pdf
    • https://s3.amazonaws.com/vavejijitatofu/dadivu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cd.bin
dcf8f3b3b846d7437cac01da6d761d629163aa97f8cc102918207ea8c2ea87ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 5020 bytes
font_01_sfnt_off0000f7e6.bin
52027d4c4354fa66ebb64a9ebb36625f863974b8180edf17a92288a9d5270e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 25368 bytes
font_02_sfnt_off0001307c.bin
a06e229dbf26ab3e6b9768d990c4ef756cc01712ac4306ce7d185b75342f850d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1307C 11356 bytes
font_03_sfnt_off00015735.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15735 4324 bytes

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