Malicious PDF — malware analysis report

Static analysis result for SHA-256 c776f75557bbc72a…

MALICIOUS

PDF

108.5 KB Created: 2021-06-07 10:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: af8211439f3373554220c48ec0bc11d5 SHA-1: 2588e839c20b99d9d0c0eec6b01cfedd5c8f065f SHA-256: c776f75557bbc72ae07a1d822b99ab1978c40fc9d049b7e7805c166d5aeac857
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document prompts the user for sensitive recovery information, a common phishing tactic. The embedded URL points to a site offering a download for 'Adobe acrobat 7.0 professional free download for windows xp', which is likely a lure to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://cructi.ru/pbw?utm_term=adobe+acrobat+7.0+professional+free+download+for+windows+xp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6013bdbd7c220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_60158c18d114a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_604cbbb2488c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_6052ac2c17a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_60563868b3f76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_6008848a641bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_6016c256a4c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6010d2dc7cdf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_600f75823caf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479222/normal_5fe9ddd11a667.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4456116/normal_60b00498b9769.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4485569/normal_60b3d1b698213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470223/normal_60582a6ee2206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385026/normal_5feb40171bbcd.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://uploads.strikinglycdn.com/files/7ed5e91b-df29-4c74-aea7-627d6e05c16b/xenoverse_2_super_saiyan_3_or_super_vegeta.pdfIn PDF document text
    • http://jetubabup.pbworks.com/f/31828878475.pdfIn PDF document text
    • http://kunixove.pbworks.com/w/file/fetch/144784398/nevanilikuzabepivupelomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3200920f-73b6-43e6-a9e6-2c9600abf3a6/sibarigokofuwuliseki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e4f48b-f2a2-4f10-aab8-31e3b0b96329/dibifiginamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1ebda5-6f9b-457a-a24b-ff57bb8109f2/customer_service_representative_job_description_resume.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/forigifipuliw.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_off00015d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D8A 5480 bytes
SHA-256: 5de117bd93e17afbbcc34b37b20f87f1938ebc76e6d1206e0d3e438240e585c2
font_01_sfnt_off00017053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17053 10852 bytes
SHA-256: 1c94ed253c7a66ad318259cd03e2d70c2ee964bb1d5b465c0a8e2e0f03f92170
font_02_sfnt_off00019528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19528 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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