Malicious PDF — malware analysis report

Static analysis result for SHA-256 48729a07d3175466…

MALICIOUS

PDF

81.3 KB Created: 2021-04-03 12:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005bdf7f93baad450f7b354dd3b30012 SHA-1: 2ad4839cd436cb790ecfce1263f5119d351f871c SHA-256: 48729a07d31754665ff04ce1d00386b6bc33e0395357cb1f1aef174262a758f0
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a domain that appears to be used for distributing malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=three+branches+of+government+worksheet+pdf
    • https://cdn-cms.f-static.net/uploads/4383452/normal_603a1fce70185.pdf
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fca0177b44a3.pdf
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fd79524847a2.pdf
    • http://zagozogenef.sportsontheweb.net/bitcoin_que_es_y_como_funciona.pdf
    • https://cdn.sqhk.co/liguvikozo/icFCg1q/5338469109.pdf
    • https://cdn-cms.f-static.net/uploads/4462059/normal_601027fdd14b5.pdf
    • https://cdn.sqhk.co/woleparos/bAgiZ7k/jedokonelodumabofizugok.pdf
    • https://cdn.sqhk.co/teforoke/jdia6mG/48204479069.pdf
    • http://collegegraduatecentraldating.com/e_r_c_p_ka_full_formkva4p.pdf
    • http://blankid.ru/99630520402lh9z5.pdf
    • http://help-lnstagramcopyrights-verify.com/39259253052gc3vm.pdf
    • https://cdn.sqhk.co/walumupo/WgcggPG/ladazabaxusatuko.pdf
    • http://submonster.xyz/ladawunaxigipezamcsaoq.pdf
    • http://busevabafumoje.iblogger.org/94024344251.pdf
    • https://cdn-cms.f-static.net/uploads/4486374/normal_600d8ac200ef0.pdf
    • http://kino-vezde.ru/suzuki_m109r_performance_partscfc4w.pdf
    • https://cdn.sqhk.co/mixaluwekitu/jgjk6aP/freedom_mortgage_sign_in.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxevimisosideg.myartsonline.com/60093155708.pdf
    • http://vulopekusape.atwebpages.com/yep_esc_beep_codes.pdf
    • http://vopepogam.rf.gd/ipod_shuffle_1st_generation_user_guide.pdf
    • http://nobufep.epizy.com/azo_dye_formation_of_phenol.pdf
    • http://ralomefin.epizy.com/aristoteles_metafizik.pdf
    • http://masusekokuberex.rf.gd/mean_mode_median_formula_statistics.pdf
    • http://movuzog.rf.gd/fobibuzexopuzos.pdf
    • http://musezuw.rf.gd/livivixosa.pdf
    • http://kulolepan.rf.gd/the_practice_of_statistics_chapter_6_answers.pdf
    • http://fawepajemug.rf.gd/mirizawabijujumob.pdf
    • http://wepogevadapafa.atwebpages.com/27692760827.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_off0000fd6e.bin
dde336627c14f79a2415695df4165b18bd2c40d567b95413d7aa3fbaf571a813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 5844 bytes
font_01_sfnt_off0001113e.bin
dabf762852b7fb1ac73b3f18906d3db840d7e6025a3cfaa2e64cfe7fe7cc6421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 11120 bytes

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