Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73fea6f395b80ff…

MALICIOUS

PDF

72.5 KB Created: 2021-03-14 03:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302e3821767d592c4319afd9b4ba1124 SHA-1: d0deb65965d7728cf6aac547ac260483a73fbf0d SHA-256: a73fea6f395b80ff182e833a60ec9a901febfc8532583a317fd8472bdabd8ce8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'golowaki.ru', which is likely used to host or redirect to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, suggesting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/wix?keyword=peggle+apk+android
    • https://cdn-cms.f-static.net/uploads/4376600/normal_6031756226d8c.pdf
    • https://cdn-cms.f-static.net/uploads/4425229/normal_60201c5601c65.pdf
    • https://cdn-cms.f-static.net/uploads/4468571/normal_600f581402704.pdf
    • http://witotikumuw.22web.org/kitchenaid_superba_42_water_filter_location.pdf
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff8ab36abea5.pdf
    • http://jidagepopisar.22web.org/vevenufinubozoletudumigi.pdf
    • https://cdn-cms.f-static.net/uploads/4413968/normal_5fe726a9eb073.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_5dc6e745658e45a59e2a3ef365aee2da.pdf?index=true
    • http://redilupabisaxo.rf.gd/double_elastic_fitted_sheet_target.pdf
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_69de6099994e44348ed1a2a2fe4b1908.pdf?index=true
    • http://weniled.epizy.com/perfect_continuous_tense_exercises.pdf
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_6e1b93b56b66495484aab77f1ddecc40.pdf?index=true
    • http://gefifeji.rf.gd/74786999367.pdf
    • http://fefipunoz.rf.gd/1505947956.pdf
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_74cb6d0766de4ce8bd8c0d846d4d9995.pdf?index=true
    • http://lusiromipu.epizy.com/peer_gynt_suite_1_piano.pdf
    • https://uploads.strikinglycdn.com/files/9b352b8f-606e-44d3-8f79-53199675d763/un_curso_de_milagros_audio_en_espaol.pdf
    • http://bedigetulo.epizy.com/why_does_my_chainsaw_keeps_stalling.pdf
    • http://tajapog.rf.gd/zasofurit.pdf
    • http://nojovawu.epizy.com/anglo_link_download.pdf
    • http://biverak.epizy.com/scotts_lawn_mower_repair_scottsdale.pdf
    • https://uploads.strikinglycdn.com/files/c371c4bb-1ccc-45c8-afdb-a34a60439d36/68762767971.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7e.bin
5c57097508c190da5834aac577f089981077c81361870436e5f3fbf5869815d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5012 bytes
font_01_sfnt_off0000f09f.bin
58d989b884ad97d623aba11b9966329c080876b01fd89773f033e6e8db4ff87d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 10512 bytes

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