Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fc3022533eca87…

MALICIOUS

PDF

68.6 KB Created: 2020-11-23 06:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e462876e8dffd0e4ea8bac2a330fb3e2 SHA-1: be695921954ee0b8995189c382d9e8a8ef9a324d SHA-256: f9fc3022533eca877fa2cff1dd38480aec3cf1687a6e1b705dd47c14f7113541
216 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including ML classification and ClamAV, for being a malicious phishing PDF. It impersonates UPS and contains a link to a redirector URL, indicating a credential phishing attempt. The PDF also contains a large number of external links, suggesting it may be part of a link farm or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.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://traffnew.ru/aws?utm_term=real+cricket+19+apkpure PDF link annotation
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f98dca6bdede.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/fafefasewejive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8c070e3e9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_5f9b72bb301d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f8e2fcca5a2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/313a6ef5-1d8c-44d9-97f0-1bc1e39a9a16/gerasakofol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78e6222-6d37-48f2-8f96-de933941753c/scouting_heritage_merit_badge_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/duniraropisa.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/bereavement_payment_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/zadivagoroguxuruje.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/convert_html_document_to_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4050184e-50fc-483f-88dd-fb7bb22f2577/relotomafelof.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/acer_aspire_e15_touch_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/calendario_2019_octubre_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/jio_4g_calling_app.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_off0000d216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD216 5028 bytes
SHA-256: f604ecc34ff69d91cf15df0e33823f51c0ecc3a5a64cdd4ae46e3966452d5ad7
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 10104 bytes
SHA-256: 9c9125a7ca310f7b960b2194c29ee7154c4909f1d2f5943cee16c1de122761db

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