Malicious PDF — malware analysis report

Static analysis result for SHA-256 6912fb0952ffe3ab…

MALICIOUS

PDF

68.1 KB Created: 2021-03-05 08:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b07a05f03312520c0429c27fc9c86c2e SHA-1: 5636ff6fb0e4d863e5c9ad1a9d76802533f0b0da SHA-256: 6912fb0952ffe3ab14e616e4cf6db4236f55f9655bfafaf6535b0eafe8798088
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple unknown and potentially malicious URLs further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9544

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jacksth.ru/award?keyword=mack+e7+crank+position+sensor PDF link annotation
    • http://gagivukamuw.getenjoyment.net/wunodidudedoxawepimavafi.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/fmqhdji/movezabaxexodojuxisatig.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/icYS4Z8/cruiseaway_by_dreamlines_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/9ggAa0w/100_greatest_classic_rock_songs_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/e1dZw7P/road_traffic_signs_ireland_test.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/27205667905.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/fhihd66/bepiletenaxupiki.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/Hjf5QHr/dumekutomafagugolo.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jeijwhe/13898462389.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/kumokiwunir.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/vapelurowar/85851699331.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/behance_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/fosujapivowazoxoropod.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/wudefiloguxaxideburatizef.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/autechre_tri_repetae.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/stanley_fatmax_magnetic_tape_measure_8m.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/xozemonizuleka.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/58310784516.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/call_aundi_video_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/aggiorna_android_auto.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/xotilekedajosovubifom.pdfIn 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_off0000cc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5E 4832 bytes
SHA-256: a7c47f6f9b97fc60b4e194c63b2029d0bf8372bb400677d2812b8117cd031efd
font_01_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10652 bytes
SHA-256: f2c30c26bfc3791a7de915c19d5c82748eba1cd35bc40be9babef586de9eb756
font_02_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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