Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c11c7c03e4c50ef…

MALICIOUS

PDF

81.4 KB Created: 2021-03-14 11:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5fb998e4c4360e1df80e71da3167f18 SHA-1: 9d40fab22e514555c789e2d8adbed5a1704e7d97 SHA-256: 8c11c7c03e4c50ef96ced1d6087e58faf92827463ecc8ecb8859df225bd2856e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a legitimate document, likely to trick users into visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of multiple unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=word+frequency+list+spanish+pdf
    • http://makipoduzoru.22web.org/juxupodolija.pdf
    • http://xoxosedefoxadu.mygamesonline.org/lanisaserimosivutedir.pdf
    • http://vivabozuna.iblogger.org/wavewetilukuwetoxisenoxiv.pdf
    • http://jakusavu.sportsontheweb.net/how_to_get_an_entry_level_mechanical_engineering_job.pdf
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fdf14328bdbe.pdf
    • http://pebonemariv.mypressonline.com/vuxogigikedagoda.pdf
    • http://nazorizuz.medianewsonline.com/jukatokebufelovez.pdf
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04a0b32874.pdf
    • http://vumogegotawugub.mypressonline.com/the_koran_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4417403/normal_5fe59e44636da.pdf
    • http://fofiwafajelerax.sportsontheweb.net/jelek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xijalovelokolep/guxelukibiviforepufejaw.pdf
    • http://taberadajip.atwebpages.com/nj_transit_bus_schedule_197.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/99204861540.pdf
    • https://s3.amazonaws.com/pazerogasarinu/jukadumesumox.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/doggy_don_cartoon_movie.pdf
    • https://s3.amazonaws.com/luworizesupox/bodipuvitokevoxirur.pdf
    • http://fewetero.epizy.com/simple_vehicle_bill_of_sale_template.pdf
    • http://gatapin.rf.gd/barbie_games_in_jio_phone.pdf
    • https://s3.amazonaws.com/davolazupivowi/95190623027.pdf
    • http://luwatejanif.epizy.com/bathroom_cleaning_roster_template.pdf
    • https://s3.amazonaws.com/wetevali/galuvab.pdf
    • https://s3.amazonaws.com/silubebebefuju/pujetevenuxixo.pdf
    • https://s3.amazonaws.com/wujodibu/what_is_tsp_account_number.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_off0000fbe3.bin
07d1dd17037845469b8366f0826eb29f2281d30fe3f8ecb468b7d15b68dc0195
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 5484 bytes
font_01_sfnt_off00010e9d.bin
d84010db53782aed8e4e1bb6c8c583c0c722284178e940729091be1da3bb3969
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 12012 bytes