Malicious PDF — malware analysis report

Static analysis result for SHA-256 d278e6194297ed13…

MALICIOUS

PDF

84.3 KB Created: 2021-03-21 21:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ba9bcb86e21a971abb2e243fd0fb8f2b SHA-1: 10962d56073129dc4bdae2b81d7b5a8440e4aeb9 SHA-256: d278e6194297ed13d9ede8da8e5b2e7cc3e7a74f40ee8fd965abd74b285aae5b
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with several pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=mba+supply+chain+management+starting+salary PDF link annotation
    • http://banquepopulaire-fr.org/5210941968377mq5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_5fe95f7a71a96.pdfIn PDF document text
    • http://neyroskakalka.site/fexewafo9itom.pdfIn PDF document text
    • http://afracheat6.xyz/vivakagoniwifonavakxty9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5fec58fdcc7b8.pdfIn PDF document text
    • https://koborabi.weebly.com/uploads/1/3/0/7/130775888/02bcca9d459848c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_604a157068833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421627/normal_60094027aec84.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/kurevipanulazob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_60226bfd4041e.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/a6652fb1-4372-4795-85fc-cf9434b7c2b1/heat_transfer_book_cengel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4868b0c-5e70-47e6-a69f-02114462a59c/powermate_5500_generator_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/finding_halves_and_quarters_of_amounts_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaef8162-b935-49e0-8128-dfc058613663/rixukizozebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08b2306-7df0-4514-8e79-08b2e0483612/30054375934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8e84ff-81da-4145-bbd3-8f34fb5cda2a/pcib_project_management_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dd634a-9521-462d-8228-4f4adef91176/margin_of_safety_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/change_reset_password_email_template_laravel.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/journey_collector_s_edition_ps4_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aef45b8-d46e-4816-9c75-837ba5087759/top_10_smart_watch_under_2000.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_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 5592 bytes
SHA-256: 271b99844ed9118b7bbee88ea6d36d4156ddd354fe42ef4c7488b3ee421e8690
font_01_sfnt_off00011e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8D 10836 bytes
SHA-256: 10e97d453a595cb59dace8ef934f13af2eb64e55bcd9651aac2a4c2b70146722