Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e12adf8739b789…

MALICIOUS

PDF

76.1 KB Created: 2021-03-07 00:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a1861f8674e53a95b7585ba1d8de46b6 SHA-1: 73a51d902b1d126724433bb0cfb52410edf0e2d8 SHA-256: 18e12adf8739b789e5e5a13d3026971ff708a9814f5aa32bbbd09abc89e41d0d
154 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure and a link farm hosted on disposable domains. The embedded URL points to a domain associated with malicious activity, likely serving as a redirect to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fokemale.ru/strik?utm_term=yamaha+baby+grand+piano+used+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5ff41b63623fe.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/ijCQ1ib/ludo_star_old_version_for_pc_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60130e8ad1d61.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/W23uCtU/wumiparajagitewanusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5ffa156c5ccf3.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/99362269405.pdfIn PDF document text
    • http://kojovud.iblogger.org/abc_worksheets_for_kindergarten_printables_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/ihijeid/problem_with_solar_system_model_of_atom.pdfIn PDF document text
    • https://cdn.sqhk.co/dumotometapo/ijayhg7/47878237759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xubejivulovitam.rf.gd/call_me_by_your_name_trailer_2017.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/quicken_2014_patches.pdfIn PDF document text
    • http://fuxotarukiroro.rf.gd/54910906523.pdfIn PDF document text
    • http://xevunikusixed.rf.gd/aramco_ipo.pdfIn PDF document text
    • http://padipab.rf.gd/roditarafivunutukibalow.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/how_do_you_pay_for_a_rental_car.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/26429519352.pdfIn PDF document text
    • http://sogigadataga.epizy.com/30490840962.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/ffxiv_drk_guide_5._0.pdfIn PDF document text
    • http://jufomotapi.epizy.com/kulanasagevivakudomido.pdfIn PDF document text
    • http://ritebononopa.epizy.com/25941588124.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_off0000e989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE989 5660 bytes
SHA-256: 1c0fe38d67a1c1fb03db7f1cf9f9346dfe96f63d200581456b564bfd7a0d79ac
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 11252 bytes
SHA-256: 59e81339f31e1fc144347befbf77e8faff05281b5a29c52e551cf3c3a9ae7fec

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