Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25c1ee48cd1d8ca…

MALICIOUS

PDF

88.8 KB Created: 2021-03-07 02:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fc03d987d78e541e62f3ec3686c1bbbc SHA-1: 3c8ff2abd07f0e441ce2d5cd98049655c7f90287 SHA-256: b25c1ee48cd1d8ca4bc17ae9dd99690ab9d6eb279e1baafa195f05857873953d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, which can be abused to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+did+jacobins+believe+in PDF link annotation
    • https://cdn.sqhk.co/tiwumixe/hbcidPa/tevizi.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/nasb_macarthur_study_bible_2nd_edition_premium_goatskin_leather.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/djjiiQp/rujezerodexufizaden.pdfIn PDF document text
    • https://cdn.sqhk.co/munakuvu/cHgzKhh/95449012774.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/hZjiiib/87447786951.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/belzonis_travels.pdfIn PDF document text
    • https://cdn.sqhk.co/fofimajazuw/RE66ivM/retroarch_switch_no_cores.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/dtTggj9/77197240343.pdfIn PDF document text
    • http://larijasetejupaz.mypressonline.com/how_to_drain_water_from_whirlpool_duet_washing_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazatuv/android_java_arraylist_button.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_80e12908076d4f5dadf479ab62ef35b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f49839-c8f2-4c0e-8efe-bb6784e2e453/ikea_queen_bed_frame_solid_wood_with_headboard.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/un_cafe_a_medianoche_gratis.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_f54611dc59c042b4a72835fbdf2c17bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ce70ba-c096-4715-aeb6-0bac9ec5b61d/jewobiwasemikaxakinafugif.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_cacea38478434e5088880447cc692892.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/wifi_smart_net_camera_v380_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/35145899787.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/ziwix.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/95636516205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a505b4-1a5e-4f90-8265-f0717087447c/nirubugedilixe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 5008 bytes
SHA-256: eeb5daa399772d3a6b45804d37997981b43f8e2e076559d85a3a6e832015b077
font_01_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 11440 bytes
SHA-256: 3f47578b93ef823b29b4e2af6b87130da45a6a52eaf46d50f5d77c6a508dcecc
font_02_sfnt_off000147c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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