Malicious PDF — malware analysis report

Static analysis result for SHA-256 284e565805e4eeeb…

MALICIOUS

PDF

89.4 KB Created: 2021-02-24 06:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b7f5ad71097e694f177eeb12f7739a6a SHA-1: 47b363fdd2b3ede16e28ea5f9556a50fb2cd2185 SHA-256: 284e565805e4eeeb24b7aa95d3e98bd181807daa8dfcab307cd621f95cd7e0ff
214 Risk Score

Malware Insights

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

The PDF document uses brand impersonation (American Express) and urgency lures to trick users into clicking a link. This link, disguised as a subscription offer, redirects through a known malicious domain to a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/moxivatejaxovavufogu.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/123?utm_term=best+rate+new+yorker+subscription PDF link annotation
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/moxivatejaxovavufogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418379/normal_5fc9faa738c0d.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/dchi0hb/koliwituradapuzixodeja.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/cff881.pdfIn PDF document text
    • http://roxopazin.iblogger.org/how_to_use_a_bitcoin_atm_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/jhAihhg/drawing_points_lines_and_planes_worksheet.pdfIn PDF document text
    • http://introdom.ru/mcdonald27s_operations_and_training_manualsytu1.pdfIn PDF document text
    • http://oneshops.space/624637882971ls4d.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jcgggKT/xifup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dajejumu.rf.gd/absolute_value_inequalities_word_problems_worksheet.pdfIn PDF document text
    • http://togipumenotu.epizy.com/gaguwenifateti.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/naruto_shippuden_games_for_ppsspp.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/mathworksheetsland_two_way_tables_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/wetepi.pdfIn PDF document text
    • http://bamefifib.epizy.com/94074042942.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_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 5340 bytes
SHA-256: 8df0b5ee12220cf281636d18aeb3800b56d53e64c4f18399f120c3412ecaf811
font_01_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 12024 bytes
SHA-256: 4475473cf60fae335ff704ac1baf73b5c495c6e854e5b1316dacb91385d3702c

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