Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6768386b2ebfa4…

MALICIOUS

PDF

82.9 KB Created: 2021-05-19 05:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2c71d766fe35fccb0b788bb9d91a8fb8 SHA-1: 6f3ee3046c2b07538b39ca3977fc6be91fa9210c SHA-256: df6768386b2ebfa48429618f7ff6bf8f924f529da45df779eb852d7d5b3cec0d
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 phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing forms. The document body, though heavily obfuscated, contains references to 'Kodak esp 3250 help' and 'wkhtmltopdf', suggesting a lure related to printer support.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=kodak+esp+3250+help PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5fdc1af725059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_60347845d8728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_601ff638768e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5fcf06cf2668d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_603fc8a3724f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_603b0e588ac7e.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/filidabut/fakudukumigexuvasefelod.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/34258377270.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/adobe_acrobat_professional_11_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/36099938709.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/the_symposium_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e30782-aecb-46fc-a15f-9779032ae9a4/holmes_warm_mist_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4d9aa5-26b9-4da0-bea7-34db36c448fb/hop_on_pop_banned_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f498f8ae-ca8a-449a-b522-9112a9f11f17/15905659076.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/esl_printable_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/74169660345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d705b6-06d1-4d96-9075-549aa9aae934/romeo_and_juliet_book_act_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vizio_sb2821-d6_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9b4f33-533f-4b3d-ae03-be723475bf48/dupokuwisebame.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/michelle_beatles_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/80816615988.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/gezaworesik.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/submittal_approval_stamp.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/nanexitavole.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_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 5544 bytes
SHA-256: a170e5cebcca66eae691a0258068d0932eda2ddf2306ebea7cc0afca28e2996e
font_01_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 11320 bytes
SHA-256: 111be9827a5679b70e6d6a1ccf4d21b8cc0b24533774a0fbacb16377e6b52d93

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