Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa250f8021302e77…

MALICIOUS

PDF

93.0 KB Created: 2021-03-29 22:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07ee2c4129532cb5559b02289bfd29d5 SHA-1: d20a554a87c89749bd5707ece06bb535903093ed SHA-256: fa250f8021302e77d7fb5491bfea0fc3fef9168a47062e0df8cf9cdfdb450578
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 numerous embedded URLs, one of which, 'https://soxebez.ru/award?keyword=easy+piano+pop+songs+pdf', suggests a lure related to an award or prize. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=easy+piano+pop+songs+pdf
    • http://yogist.fun/english_to_sinhala_translation_dictionary2bvli.pdf
    • http://yognat.space/scratch_2_offline_androidabhyx.pdf
    • http://zexaribamemavi.sportsontheweb.net/auto_repair_near_me_open_sunday.pdf
    • http://vajukadezazi.getenjoyment.net/operaciones_combinadas_con_fracciones_con_races_radicales_y_potencias_ejercicio_resuelto.pdf
    • http://hermidkovo.info/amasr_act_2010ye5e2.pdf
    • https://sizizobit.weebly.com/uploads/1/3/5/3/135389707/sivututegukad_zarerijigupaka_bunemufuj_riteko.pdf
    • http://zebolalifitu.22web.org/black_and_decker_3_in_1_waffle_maker_recipes.pdf
    • http://1-bog.ru/sepsis_icd_diagnosiskyjhr.pdf
    • http://kfcrabota.ru/luginijezuwiwilofabakagidlafj.pdf
    • http://xuxijosut.sportsontheweb.net/nail_salons_taking_walk_ins_near_me.pdf
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/bufumowifijaxopak.pdf
    • http://ig-about.net/kikikojozusdc9ue.pdf
    • http://bcpzonasegur4viabcp.com/
    • http://kitixukizogutik.mygamesonline.org/44243292643.pdf
    • http://coolvdomaion.online/bomewugemadizikomiluvwk5g.pdf
    • http://blancop.xyz/how_much_is_miles_brown_worthgplmo.pdf
    • http://topplafond.xyz/sapo_y_sepo_inseparables_libro_completo_gratis8l14t.pdf
    • https://kujofajatoniw.weebly.com/uploads/1/3/1/4/131406813/6a9e4327d0b6.pdf
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/zapal_fuvejaw_vedab_migotiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jusutiri.rf.gd/remanufactured_42re_transmission.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_off00012f8f.bin
cc90acdd57bb01ab5da291e38a4bbe45f33a3e6535d5235e5a8ecda86ee951ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 5140 bytes
font_01_sfnt_off00014136.bin
de52d4ad73cf3866309e4fe364d9a5b6a57a4eb655ee6424e1b8e326adec5dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14136 11020 bytes