Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57b0ff7830fca68…

MALICIOUS

PDF

80.7 KB Created: 2021-03-12 01:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7db30ddc0f866fdd1582097539f62259 SHA-1: 6ccb94297c4a9d6214ee02fd7e05d076dfd1d7b9 SHA-256: a57b0ff7830fca6891f48db142f95e9fd704d4fa5dbf9ed1e5b702136955df55
156 Risk Score

Malware Insights

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

The file was identified as a malicious PDF by multiple heuristics and a machine learning classifier. It impersonates Spotify to phish for credentials, using an embedded URL that points to a redirector. The PDF also contains external URIs that may be used for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lamobivuletopuk.weebly.com/uploads/1/3/4/8/134863798/5213433.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://ponafet.ru/aws?utm_term=roku+3800x+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5fc6582c831c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5fca9566dd434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_60132a655fe52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_601a74d2b756b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379230/normal_5ff0e8aaa0bba.pdfIn PDF document text
    • https://lamobivuletopuk.weebly.com/uploads/1/3/4/8/134863798/5213433.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/vavujujigawexiwoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_5fcd9983b7bfb.pdfIn PDF document text
    • https://loxazubak.weebly.com/uploads/1/3/0/7/130739809/82e0c5be858b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483089/normal_6048df0144cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_602c5d04d1802.pdfIn PDF document text
    • https://bilezebije.weebly.com/uploads/1/3/4/3/134344171/pinodobun_muduza_kasezumuko_vesuvefowenofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejomozudone.epizy.com/lugonabewufekezud.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/fakojegipim.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/pirates_of_caribbean_theme_music_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/math_worksheets_for_6th_graders_free_printable.pdfIn PDF document text
    • http://wivegetozedogal.epizy.com/what_is_elective_cesarean_section.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/35192645520.pdfIn PDF document text
    • http://libevomupukado.rf.gd/me_after_you_paul_kim_meaning.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_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 5196 bytes
SHA-256: 696572b5ec61e4caecfed92ea90898d60d63385aa63d608644161f97a221a582
font_01_sfnt_off0001101f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101F 11024 bytes
SHA-256: 160f520f70953cdf68059dda77635597da5c37573ef87c0640df6d37a8c11676

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