Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da1febc44c71e80…

MALICIOUS

PDF

78.0 KB Created: 2021-03-20 09:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2f6894703c236bf5ee42675e36e585 SHA-1: 696554c46377e6bbe38c50f2208e51ed645d2f9b SHA-256: 0da1febc44c71e802bee316182bae7f261c755298dee0af3f2dbf87ef222eae6
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a known malicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'cardiorenal syndrome'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=cardiorenal+syndrome+pdf
    • http://jenuxijaf.mygamesonline.org/the_complete_works_of_swami_vivekananda_drive.pdf
    • http://xeratigike.medianewsonline.com/texutilonuxudiwuturaro.pdf
    • https://cdn-cms.f-static.net/uploads/4451755/normal_601996fa97b01.pdf
    • https://static.s123-cdn-static.com/uploads/4454184/normal_60078c25d7bf5.pdf
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5fe5bb42b4f98.pdf
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5fe16b0d9e5f1.pdf
    • http://bixuvukulizolu.22web.org/resumen_de_el_libro_la_ciencia_de_hacerse_rico.pdf
    • http://dekagexagupeje.iblogger.org/film_habibie_ainun_2016_lk21.pdf
    • http://bafedudovodamo.medianewsonline.com/union_bank_cheque_book_request_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gerekuvuburase.epizy.com/adda247_general_awareness_book.pdf
    • https://s3.amazonaws.com/tuxutedi/child_care_consent_form.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_0120d1007d71474fa797e123e38c7b50.pdf?index=true
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_79d27a062a8a40e3a1022f3806594430.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c49b6350-0a57-4686-acff-30e7b5a1cfc2/how_best_to_describe_the_moon.pdf
    • https://uploads.strikinglycdn.com/files/e7c091b3-6c1b-403c-80dd-a1148cda27bf/vitamix_5200_blender_pitcher.pdf
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_85e3569acfef464c98048fe8f3f7c696.pdf?index=true
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_26f5a1bf995c47b69343b9aa0927746e.pdf?index=true
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_d823ac2c994a48d087a136da73c4af37.pdf?index=true
    • https://s3.amazonaws.com/wobuzisibal/army_opord_back_brief_format.pdf
    • http://mimulumila.rf.gd/kuxikoxojipixugo.pdf
    • https://uploads.strikinglycdn.com/files/e2140648-9a15-4e3f-ba02-9b9ac1ad33c5/20823889819.pdf
    • https://uploads.strikinglycdn.com/files/e4612b23-d8a2-4511-8a2d-bbb4ccb7a0c4/does_charlie_die_in_flowers_for_algernon.pdf
    • https://uploads.strikinglycdn.com/files/a651d457-ba74-40b3-85ff-4571a71276d9/oster_turbo_convection_oven_instruction_manual.pdf
    • http://fofuxolisemaxim.epizy.com/how_much_do_cleaners_get_paid_per_hour_uk.pdf
    • https://s3.amazonaws.com/dusined/tropical_house_2019.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_off0000f4c0.bin
43d00fbcfba9fb778c68f3e0a59b5420dba7ccab9fa4b52defda734be825aa24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 5196 bytes
font_01_sfnt_off00010657.bin
7af95c4ce4ceab5351644d3274ca7d95bc737149fdc4e808edbcb39672b5208b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 10504 bytes

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