Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da4a07f953fb2a4…

MALICIOUS

PDF

81.5 KB Created: 2021-03-06 23:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 672a23a3043d72f46748470f76ed43e1 SHA-1: 328d13c2a165860af028ec3727ff15045be0e94d SHA-256: 3da4a07f953fb2a45e502d5f8acfb83f0b19d37c525e3360410601dadf1c13e5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent. The primary goal appears to be directing users to potentially malicious websites through a deceptive podcast lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=charlie+birger+podcast PDF link annotation
    • http://blue-tick-central.com/165948893119bgku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_603ebc131b1f2.pdfIn PDF document text
    • http://prodson.space/citra_emulator_android_best_settingsckm2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_6019db36806e7.pdfIn PDF document text
    • http://wazumitizun.22web.org/58480255251.pdfIn PDF document text
    • http://setiwevosina.22web.org/maharshi_audio_songs_telugu_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446015/normal_6006b78cb925f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_de7bce9ec06a4db5932422611a9ba8ff.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_f889d17fdc7d4c03b34f463d75a641ae.pdf?index=trueIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_3bf5466f286e45b2b9b88b073afc1a9a.pdf?index=trueIn PDF document text
    • http://rumajajoneder.rf.gd/icds_9_borrowing_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/13847967673.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_19b3e9e36d1541d28f4b8dcc904a96b2.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_b8411284f42b48d3951e53a527433839.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegozegi/alberta_tenancy_agreement_inspection_report.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_d1c3f954044a4f90b2b54c886d6e184c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/2259771353.pdfIn PDF document text
    • http://liforese.epizy.com/android_modal_dialog_example.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_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 5380 bytes
SHA-256: 00bb8cdb7a524d5cff607fe47bf0c8ea894cf0a8f178386a9ef3d635f053bd15
font_01_sfnt_off000114a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A7 10636 bytes
SHA-256: e50f5543e83eaae95d665c84176d29669ca5b7953a62ba027846973a99030671

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