Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e065b1d8507f0e…

MALICIOUS

PDF

86.9 KB Created: 2021-02-18 11:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e337428c02baea17a0764a6c17037fce SHA-1: 194366aba7fbee1cbbbe52db95926a69b6ab71e3 SHA-256: f1e065b1d8507f0ea1c8264544eed0d9676b27924c4de1770442a59c4c1d9104
96 Risk Score

Malware Insights

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

The file is a PDF that contains obfuscated text and an embedded URI pointing to a suspicious domain, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of multiple embedded URLs suggests a campaign distributing further malicious documents or payloads.

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://maypoin.ru/123?utm_term=brother+pt-d200+instructions PDF link annotation
    • https://cdn.sqhk.co/xezexasag/hfhbNTf/gakuzakiwuluwisiwuz.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jejdLja/crazy_games_rush_hour.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/gcjgKXX/tizate.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/hCghtHt/ted_cruz_twitter_subpoena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fe618edd4f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_6012d0615c210.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/jwHWYYo/76802576014.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/jfYhjHA/marawajokidonopifizimuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5ff90123f0815.pdfIn PDF document text
    • https://cdn.sqhk.co/pifitudebuxo/GY4fgg4/8683662393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365661/normal_6005dd1eb830f.pdfIn PDF document text
    • https://cdn.sqhk.co/nexupumile/iehfHK6/warlords_of_aternum_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/YzoNGRV/bluetooth_speaker_for_car_cigarette_lighter.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/Ihi3giA/fapadozuleroboretimegedak.pdfIn PDF document text
    • https://cdn.sqhk.co/disovaje/cgcbOgi/recargas_a_cuba_nauta_rebtel.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/d5gegeY/rurimipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/vopomop.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/pure_data_tutorial.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 5272 bytes
SHA-256: 81d8afbe1378e8eec466f65c54273f78663e89127628d623ed8afdded7be6ae2
font_01_sfnt_off000128ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AB 11096 bytes
SHA-256: d2f7a22e733ae165c3235effcb3262077d2340a7cc2d14509d746de24d815e8e

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