Malicious PDF — malware analysis report

Static analysis result for SHA-256 56531615f39c6dfb…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 00:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9a7d16e2461f70174761f27cafa71b26 SHA-1: 2a4d4ca6cc3cda09e05f3348b5aee4221e3c0c8d SHA-256: 56531615f39c6dfb4469f66bda33b6d2621ab4fe15e73456a36fb0da14a5b539
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates tracking or phishing attempts.

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://vilenefex.ru/strik?utm_term=how+nmap+can+be+used+for+network+reconnaissance PDF link annotation
    • http://bolawixefop.mygamesonline.org/cerita_alkitab_anak.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ihQhcgi/dolumabimafuditeni.pdfIn PDF document text
    • https://vanupumurugul.weebly.com/uploads/1/3/4/5/134505943/1523553.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/vepanekojowipij.pdfIn PDF document text
    • https://sibabaku.weebly.com/uploads/1/3/0/7/130739132/6330a85e0.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/bangla_electrical_book_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vufuvevu/oeiigje/e_tv_guide_south_africa.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/algebra_formulas_class_9.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/6299268.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/blAiaYa/samsung_level_box_pro_price.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/aibidME/pivanetud.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/gm75heJ/pufepamibunusopexew.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/carnatic_music_senior_book.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/4d5b4e0f.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/fuzesuzajironal.pdfIn PDF document text
    • http://fivaset.22web.org/saudi_airlines_ticket_print.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/36465131341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukabawibuge.rf.gd/xasitepaxewerejija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64cc76d-d6fb-4bab-918c-7579e837db41/mavesawarebunugirukunawaw.pdfIn PDF document text
    • http://gipipirerogarul.rf.gd/what_does_colors_mean_in_wireshark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7592e51-da9f-42e3-a35f-45a4f913cfb5/what_is_linear_behavior.pdfIn PDF document text
    • http://ravimerafewede.epizy.com/42477627927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e5b5e2-7db7-43fd-9e1f-553d1fe7950f/how_much_does_it_cost_to_run_a_portable_ac.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_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 5524 bytes
SHA-256: c8fa7dff0968b5f84b5aed1a97069a6d1a688af8b5213bc88ae45fed7445cf3f
font_01_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 11080 bytes
SHA-256: b195009b1f77f8e4922dfa6d4021f2f3765b88b23bb7027c6cb84a574b0b2f0b

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