Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9fe7d087a2aae0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-10 18:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f8447459bad58cf27ff4bd00aa5159a0 SHA-1: 44e8dc147d8c2c4b4088e95d6d6849d230d1e8b7 SHA-256: ba9fe7d087a2aae0d05b8d4ff63a0cc3b9a27049bac3d85dda68b56feb81b3bf
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/123?utm_term=oahu+north+shore+wave+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422386/normal_603f4c144e94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_6018cc0f52dc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410714/normal_5ff34e1e34781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ff96ea52c14a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_60436e6b49748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_6044e6e50b4ae.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/61647e896e68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5fce7b38de080.pdfIn PDF document text
    • http://paselon.getenjoyment.net/87834674611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fe67166808a3.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/what_does_the_bible_say_about_church_planting.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/simple_past_exercises_perfect_english_grammar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_6033358159ed3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447912/normal_5ff869c52af5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff664e9ab8c7.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/2007_ford_explorer_repair_manual.pdfIn PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/8690487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5fef475139add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_60319c711f5a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebokegekesuded.atwebpages.com/sikopo.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_ccd4d03d831f47c0965a0015ad505ec7.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_1a8a6a2ffce6418dab4b5c307e1fe7f5.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_c6f05815ca2140ac84e95e91fd89d61e.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_37a1304e8042439b8828fea1cb85f9dc.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_cb2362960fac467faf1f4de20ceae2a7.pdf?index=trueIn 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_off0000f49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49A 5052 bytes
SHA-256: d8b1825b13e876a3af8d0056cdc54c933619d62e75032dee7a9782a2a76c6ba9
font_01_sfnt_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 10960 bytes
SHA-256: e777d356116c374514b2d92d22d251a369e08874c7f082a95e649d2ca1ae51c1

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