Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f77144a42b6133a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-01 19:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 38b68e2c8006195d448ed633576e1a12 SHA-1: 8499107cd79fdd66aec1533ce59627752a5d2563 SHA-256: 9f77144a42b6133aab009e7c6a6eb47010d5ed187957c2bcf844174b90f49e6d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The sample is a PDF document flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious. The 'SE_MFA_LURE' heuristic indicates the document's content is designed to trick users into providing credentials or approving multi-factor authentication requests. The embedded URL, https://maypoin.ru/strik?utm_term=liftmaster+security+plus+2.0+error+code+1-5, likely serves as the destination for this phishing attempt.

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/strik?utm_term=liftmaster+security+plus+2.0+error+code+1-5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474759/normal_601ee5ab188c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_603083dae90ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_602b835c67aab.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/hbhchh4/nijefiroxuwoja.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/8ihgihf/ps4_emulator_for_pc_free_download_no_survey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_600f23bc6dd29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_602706489a9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fe84d21cc307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5fdadeb8a9026.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/igcLjfa/bulabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fd7a15f81ae9.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/gedesisumi/xuvefefer.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/linux_programming_language_hai_ya_nahin.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/best_award_show_music_performances.pdfIn PDF document text
    • http://fugewep.rf.gd/95606910237.pdfIn PDF document text
    • http://vukapolil.rf.gd/53989370943.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/rimixawemizoxiwavo.pdfIn PDF document text
    • http://lokeliniju.epizy.com/seduwiwel.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_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 5860 bytes
SHA-256: 7cfec2b51aaa0d2d3307a5dbe4be9eb9ff8b61816d33a6d9ee1c8b0e8457a73a
font_01_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 10524 bytes
SHA-256: f5a07429fd3eb4a1d5811b4579a4a631a9ad11eaa7dc68d6c9e0d022b5c8dc2b

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