Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbe90f33b36ebc6…

MALICIOUS

PDF

64.9 KB Created: 2020-12-25 21:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5a0343eb1e1e6847a393a47a3ace9676 SHA-1: 11655e7a9b855004793c6ba512603e24a72218f5 SHA-256: 4bbe90f33b36ebc654347fa2131b469aa276ab8adf38c195239514612f81e64b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external PDF links. The primary external URL, https://trafficel.ru/123?utm_term=foothill+high+school+palo+cedro+basketball, suggests a potential phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://trafficel.ru/123?utm_term=foothill+high+school+palo+cedro+basketball PDF link annotation
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/966153.pdfIn PDF document text
    • https://mukekevujawova.weebly.com/uploads/1/3/0/9/130969498/ed3ad550caf4a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/velawazuziwiteti.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/bella_figura_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659d5e47-924c-41b3-b2aa-201ec248eff6/22577503546.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/free_printable_genetics_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3fbaab-3d55-4d9a-83af-fe83986ad809/sonicwall_failed_to_open_the_ipsec_d.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/hellblade_senua_s_sacrifice_ps4_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecdb83c-9354-4c9f-9558-c23f81302e8d/kisorilisifovabekevuzolad.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/new_nutrition_facts_label_template.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_off0000c00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00E 5492 bytes
SHA-256: 77de05b9fb0fb2ac02989875a0a850914b5912da74066a137df1a240ee141a57
font_01_sfnt_off0000d2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B6 10088 bytes
SHA-256: 645d99a56883b83eed78823941d2c746b06e3ae590aba05784dcd0be9b978c4b

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