Malicious PDF — malware analysis report

Static analysis result for SHA-256 049a50add2ba20bc…

MALICIOUS

PDF

75.3 KB Created: 2021-01-28 17:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0fff54d635a3776bca74539da57813c6 SHA-1: c5713f24c469c3dca19d339a90f5a8268ce20d3c SHA-256: 049a50add2ba20bce41dc986ed22a0b882e8d3f0b6a976e2b0e71b176413d727
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one explicitly noted as an invisible lure to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a site that mimics a login or download page. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wb?keyword=chrome%20music%20lab%20song%20maker%20bad%20guy PDF link annotation
    • http://policyhelpcenter.com/sunday_school_stories_in_telugu_free_downloadiug4t.pdfIn PDF document text
    • http://katermore.ru/aurora_terraria_ipqlyjj.pdfIn PDF document text
    • http://loginwithfb.site/ejercicios_resueltos_de_notacion_cie9xbrw.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/fikav.pdfIn PDF document text
    • http://raliwoze.iblogger.org/china_visa_application_form_vietnam.pdfIn PDF document text
    • http://daimontimur.org/offer_to_buying_car_through_paypalde3g3.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://s3.amazonaws.com/rudelazifizuvo/advance_wars_dual_strike_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/wonulisedofomuzer.pdfIn PDF document text
    • http://puzufowos.epizy.com/twitter_video_to_mp4_er.pdfIn PDF document text
    • http://kiwusegofavuto.rf.gd/energias_renovables_colombia.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/video_collage_maker_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/bachna_ae_haseeno_song_raagsong.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/38709675659.pdfIn PDF document text
    • http://telawusufolij.epizy.com/zuruxopedir.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/bmi_coding_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/89224038950.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/52364838462.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_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 5484 bytes
SHA-256: a3344ee4d596224d300ca5965ac3c1bb342b038449767997736a3b038ad939d4
font_01_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 10712 bytes
SHA-256: 7259af72c61364eda6ad3c50e1a0fb437c0b3be1476f9d45957ef33b50fb2fef
font_02_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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