Malicious PDF — malware analysis report

Static analysis result for SHA-256 de31bae0db66fde6…

MALICIOUS

PDF

99.6 KB Created: 2021-03-31 13:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 623e9828139706d7529af8589e764512 SHA-1: fbc431e079fcf0440596d72b0e039143dc754d00 SHA-256: de31bae0db66fde6430505c90ea3fb21d861e0494636fd0e8133b298497e8d37
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, combined with the heuristics for advance-fee and payment redirection scams, suggests a phishing or fraud attempt. The embedded URL `https://yafferge.ru/award?keyword=lok+sabha+election+date+2020+pdf` is a primary indicator of this malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/award?keyword=lok+sabha+election+date+2020+pdf
    • http://shoop-fo.ru/1994_softail_service_manualkedig.pdf
    • https://funapimezu.weebly.com/uploads/1/3/1/0/131070883/6466654.pdf
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/6910563.pdf
    • http://trastenmyqort.online/adobe_illustrator_draw_ipadpusb6.pdf
    • http://gukabibus.mygamesonline.org/sozofeguwi.pdf
    • http://rogosevit.22web.org/offline_3d_games_mod_apk.pdf
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/5995335.pdf
    • https://cdn.sqhk.co/fufeboxeri/awEbYND/raptors_warriors_game_score_live.pdf
    • http://nibelv.xyz/epson_iprint_para_iosq6qqn.pdf
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/dfe83c77.pdf
    • http://pitushok.fun/57559181997vco9h.pdf
    • http://mejagudabukode.iblogger.org/wagujeje.pdf
    • http://lilubaxubaxulu.sportsontheweb.net/63417611893.pdf
    • http://getcreditreport.info/functional_analysis_sociology_definitionrdmi3.pdf
    • https://cdn.sqhk.co/vizakifito/hjIc2MS/viridian_color_mix.pdf
    • http://sivelural.mygamesonline.org/caballo_de_troya_5_cesarea.pdf
    • https://cdn.sqhk.co/bupewazadufa/g1yidvS/geometry_dash_meltdown_download_full_version.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gexepitirunagu.rf.gd/3168779978.pdf
    • http://xonelamurojili.rf.gd/iso_drawing_symbols.pdf
    • http://wejufutaz.onlinewebshop.net/the_uglies_book_report.pdf
    • http://purowubiwebig.epizy.com/vusojigedikaguv.pdf
    • http://laletanegimiw.epizy.com/descripcion_de_los_personajes_del_cantar_del_mio_cid.pdf
    • http://bibirosomuxir.epizy.com/wimuxe.pdf
    • http://vowiguwoku.rf.gd/are_mechanical_pencils_good_for_drawing.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130c7.bin
2577343596a13f46ddb3536456987ae432b7acf19da24dbf3071defab9bfe5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C7 5568 bytes
font_01_sfnt_off000143b4.bin
938043f6ea114040a0486d1325b894b8dedee4e37ad8082617904388325cefad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143B4 11776 bytes
font_02_sfnt_off00016c4c.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4C 16164 bytes

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