Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9068fb483f9db1…

MALICIOUS

PDF

85.7 KB Created: 2021-03-28 11:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: afee55814b035b4cd21e51c64a77d8a9 SHA-1: 0b12195ab5c62d6fbfecda3dc89ac8c01069018d SHA-256: 4b9068fb483f9db1cd6563e1993d9053a09240b103486956a0d1d165bfc71019
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to redirect users to various sites, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://soxebez.ru/award?keyword=99+flowers+name+in+tamil+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368219/normal_60358a67c470d.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/dixitivekufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_600259b2321c3.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/aphrodisiaque_naturel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_604b8992418d6.pdfIn PDF document text
    • http://dovulup.iblogger.org/8813183664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370076/normal_5fca9a248b084.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/e1b053e4-9675-4632-9fa5-7fd95e6dd9ac/how_to_say_mami_in_spanish.pdfIn PDF document text
    • http://bagavux.rf.gd/gate_agricultural_engineering_syllabus_2020.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/difumixigobebolowilep.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_0acea7db12f44492bfa25bc322cbbf25.pdf?index=trueIn PDF document text
    • http://lumosaneja.onlinewebshop.net/39427504240.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_b9b383d489bb4ec5b76f9e33597eb32b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3ebaf1-6fa9-4eb4-9e32-cd7527039d94/zapibudatew.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/alchemist_hospital_online_lab_report.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_435d64e0e148492bbd2b80bc623cf614.pdf?index=trueIn PDF document text
    • http://benadukejojal.epizy.com/fun_alphabet_activities_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/33412636243.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_810f45f29bf24c46886148c7709ee50a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/wow_classic_can_shamans_use_2h_swords.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/24580970506.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/52494865465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523d024e-f056-4545-92c7-c5bbc0ea2b0c/rerikon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e208f6-8cf3-4167-99dd-9b24c1b1bf5a/xixewuvudadigufozuvo.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_off0001122e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122E 5340 bytes
SHA-256: 472de5c005b7337fbb8c892eacff27ce4cae6175c5fdd3015b5e775035f29f84
font_01_sfnt_off0001244d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244D 10924 bytes
SHA-256: daca0b14ade82bbc5241f71bf16ac12dd11c5a77000ade8aa9ebdeb2bbf9118b