Malicious PDF — malware analysis report

Static analysis result for SHA-256 2467c15b7943d62e…

MALICIOUS

PDF

74.5 KB Created: 2021-02-12 07:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 93f5747f158a318f0f04558801edd258 SHA-1: 6b66fd1693b6c203464d92732d4f70601c5e2517 SHA-256: 2467c15b7943d62e9aaa1f5b6d126cbcf93fd8d72d00c54f9c48e0cb02df3b35
146 Risk Score

Malware Insights

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

The PDF contains a lure for "robux for free 2020" and multiple external URIs, one of which is a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a trojan delivery. No scripts were extracted, but the embedded URLs and link farm heuristic suggest the primary goal is to redirect users to malicious websites.

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 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.
  • 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/wix?keyword=get+robux+for+free+2020 PDF link annotation
    • http://lizixute.iblogger.org/werigafuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_601dccdfa0b00.pdfIn PDF document text
    • http://rizaxezo.iblogger.org/69791315265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_5fcc40f5a6514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_60152b77db667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_60018d514426f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5fdef258a241b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzewinabo.epizy.com/3rd_grade_language_arts_worksheets.pdfIn PDF document text
    • http://fowodusozid.epizy.com/7th_birthday_invitation_background_templates.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/food_allergy_training_quiz.pdfIn PDF document text
    • http://tizepadeda.rf.gd/wefutisumus.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/36056510196.pdfIn PDF document text
    • http://demujub.rf.gd/72750585410.pdfIn PDF document text
    • http://guxodolabisiruj.epizy.com/lefubadadugiwalijavi.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_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 4856 bytes
SHA-256: 5fc86f1ffa5649722ee4ee3df09a09de77b4e0a164bfa3e0376ad141ec623eb0
font_01_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 10596 bytes
SHA-256: 886872464fe2b42faec34305441393453642b7e9701b7be23d26c596d68f3475

Open this report in the interactive analyzer, or submit your own file for analysis.