Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c7ed0b3eaa7444…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 14:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 03df7ffdc1cb3cd7bff1304ed73770f1 SHA-1: dfb6b26e91eb54d85659c439313ab3a871a89398 SHA-256: b8c7ed0b3eaa74449da8f31ea8645f049e64f16fc93a9c2055d2c34b49cbd8a1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=how+do+i+sync+my+smart+bracelet+to+my+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470681/normal_601af0ada7c56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501201/normal_60036578bee98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_603b434a10dca.pdfIn PDF document text
    • http://zagafen.iblogger.org/61986064946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501484/normal_602b468617a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_602517a08e910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415331/normal_5ff0f7dedf929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_60351543ea28d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_6049c3c4c9d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500878/normal_60447605c5bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_6059ca492bccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_604544857e075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_5fe3b4564b725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_60346d287dfbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5ffcb1643d91a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480895/normal_60071a468a707.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/sukedil/despacito_song_tune_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/26878481276.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/biometricprompt_example_android.pdfIn PDF document text
    • http://vudazirukileri.epizy.com/58505077591.pdfIn PDF document text
    • http://wuparol.epizy.com/14265511477.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/siemens_plc_instruction_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/how_fast_can_a_125cc_dirt_bike_go.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_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5608 bytes
SHA-256: 807b9e28d4293a786b84b6242f9c63ff18575084382e2df9812fd5e56fb3632f
font_01_sfnt_off000117ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CA 10480 bytes
SHA-256: b6afe4f78c830a2ba6b1cd260caf620c00f2af7eca6f40302d0cf45626904865

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