Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0daf5a0c638748…

MALICIOUS

PDF

85.3 KB Created: 2021-04-16 00:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f48b5ed1be365ea01b7f60ad841ecee7 SHA-1: 74b66546bfc6cba715977f75e3b36d942767c1ca SHA-256: 8c0daf5a0c638748cb5160071ed0b4bfd6687902c0e9b439169765872ebf8815
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, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to 'Nordictrack skier workout plan' and is associated with an external URI pointing to 'midufefew.ru'. This suggests a phishing or malware distribution attempt, likely leveraging social engineering to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/strik?utm_term=nordictrack+skier+workout+plan
    • http://pugisapi.mypressonline.com/32462801742.pdf
    • http://kigirifaduguv.getenjoyment.net/a_muralha_de_gelo.pdf
    • http://itrom.fun/monster_rancher_2_switch_north_americaowmk0.pdf
    • http://siteznakomstv69.space/wuluxivomunevieul.pdf
    • https://cdn-cms.f-static.net/uploads/4502819/normal_60298eb698346.pdf
    • https://cdn-cms.f-static.net/uploads/4448328/normal_60443c0b8ea27.pdf
    • http://lnstagramverifiedbadge-media.com/nalaxkk7e0.pdf
    • http://rebezun.mygamesonline.org/antioxidant_meaning.pdf
    • http://purpless.vip/how_to_change_a_heat_thermostats2v5k.pdf
    • https://cdn-cms.f-static.net/uploads/4446287/normal_5fdbb043b96ff.pdf
    • http://amsidisi.xyz/90128880104o2a3u.pdf
    • https://cdn.sqhk.co/vedimurami/d0LAicc/pogosiputip.pdf
    • http://metiwizonud.getenjoyment.net/ponovego.pdf
    • https://cdn.sqhk.co/nolagutotato/XXigjhU/download_game_alien_zone_plus_unlimited_money.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/banula/13633169427.pdf
    • https://s3.amazonaws.com/mexavofezoxi/rlc_circuit_lab_report_conclusion.pdf
    • https://s3.amazonaws.com/godewumazek/mogonobugofavisu.pdf
    • https://s3.amazonaws.com/xilasisefi/bojod.pdf
    • https://s3.amazonaws.com/zasepo/adding_and_subtracting_fractions_visually_different_denominators_worksheet.pdf
    • https://s3.amazonaws.com/lumixi/simcity_4_download_free_full_version_pc_game__crack.pdf
    • https://s3.amazonaws.com/gajabedafot/guided_reading_template_free.pdf
    • https://s3.amazonaws.com/vabedafozo/how_to_write_a_poetry_comparison_essay.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef4.bin
98410e362982c85f6a3e5cff9160414a3d0262dd0ed21e757016727f6bc855a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF4 5076 bytes
font_01_sfnt_off00011058.bin
3cb061a9e6d0130bc753e00d4c69b055e90a8398d889dc612008cbf04692e2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11058 11992 bytes
font_02_sfnt_off0001380e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 4324 bytes

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