Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f2249a707b34c5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-12 14:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d17bc24547ac2ed676df2c0242368847 SHA-1: 86a87846dc2541789340fe37c2eacb4688a3f0d1 SHA-256: a6f2249a707b34c505f26ddd28a6fb42429b1a5780dbd23c893b03424dc7947e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary external URI, 'https://midufefew.ru/wix?keyword=wrong+turn+6+online+stream+deutsch', is likely a lure to a phishing site or a malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://midufefew.ru/wix?keyword=wrong+turn+6+online+stream+deutsch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601d383d7a34b.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/fhcBggG/printable_handprint_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_603b8a4fb9941.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/lugelanof.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/jijgiby/lodikubevewodanadarigam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_600438f5d2545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_5fd31e9e9c6e0.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/XyRigja/21047320814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_5fd949a29320d.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/QBgccib/66133130814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_603ba9957853f.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/ayatul_kursi_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_83c13a32de7e49dda64ef4464034e643.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_fefd6e873ae240abb24ed7bd8a557e83.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e581cb04-1f03-449f-8e7d-4631eaf4f4ca/how_to_bypass_e_brake_on_pioneer.pdfIn PDF document text
    • https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_2c367c48cae74da098a498f4386f8b2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b875b726-90fc-4562-a585-9dad7720da22/6846699091.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/westinghouse_timer_instructions_model_tm416.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/ripubezazunedelifiguza.pdfIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_ea41eb1fbd8e44499c5d303bb38651e8.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_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 5520 bytes
SHA-256: 9112f71990f371fdf9cab67a921c162dce3eede9dceac0afd590c311489d5453
font_01_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 10236 bytes
SHA-256: 2858cc2bf92f3006b6dc98d6ba7eb8b1016d6505257e5e221b0e7a11259ea91e