Malicious PDF — malware analysis report

Static analysis result for SHA-256 11accf973b7386be…

MALICIOUS

PDF

74.0 KB Created: 2021-03-01 07:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 562fd3956e3f503981696fe5a5659eb6 SHA-1: eec6ad5550907b377a7fea5fadd8d1432d56eaca SHA-256: 11accf973b7386be189af3909f8eba67e1d3045666ad141fc2221053a8bae83d
156 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates Amazon, a critical finding for credential phishing. It contains multiple embedded URLs, one of which redirects to a malicious PDF hosted on a weebly domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/pibidewuvederujiwotu.pdf.
  • 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://xezojetit.ru/strik?utm_term=merriam-webster%2527s+pocket+spanish-english+dictionary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fd28907760da.pdfIn PDF document text
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/pibidewuvederujiwotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_5fdc5b0526d5b.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/2570098.pdfIn PDF document text
    • http://idealicait.website/728563645452lxr2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_60258c1bc43a0.pdfIn PDF document text
    • http://bluebadgeform.com/41164536921y4au3.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/jebupofedijakuk/wanted_bhojpuri_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/bogutudu.pdfIn PDF document text
    • http://rotalewisiv.epizy.com/penyebaran_agama_kristen_di_indonesia.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_off0000e30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30F 5956 bytes
SHA-256: 19cad670ebabbec55f2cce736bdb793416d170092d4cf2889e4c8e84adb6293d
font_01_sfnt_off0000f756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF756 10436 bytes
SHA-256: 8e010c2b2af62a65ddbd54253c324cc3a5f5e987c22cfd29d4cc419c8cbaca3f