Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bba28c808184b4…

MALICIOUS

PDF

73.3 KB Created: 2021-02-06 04:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ae2e4736e2924b157a7bd801202c269 SHA-1: 05099cec6c00eb47a11828e051554e056ade28f4 SHA-256: c5bba28c808184b4a7c182d3f640a099caecb8566e7c37a4248602bf7c23e6b0
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, a common prelude to executing malicious commands. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jacksth.ru/wb?keyword=game%20dev%20tycoon%20ultimate%20mod%20editor PDF link annotation
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/5319666.pdfIn PDF document text
    • http://laulu-go.ru/adobe_illustrator_cs6_crack_indir826u6.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/lukowalanizemodegos.pdfIn PDF document text
    • http://salonlabs.xyz/monster_hunter_world_character_creation_female_guidehipxz.pdfIn PDF document text
    • http://copyrighthelp.info/call_of_duty_garena_hack_apklq1yp.pdfIn PDF document text
    • https://linazoforup.weebly.com/uploads/1/3/0/8/130814758/2f4c12a0.pdfIn PDF document text
    • http://quickstore.pro/asme_code_b31._3969yy.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/sekirevilks22l.pdfIn PDF document text
    • https://jazolesapixol.weebly.com/uploads/1/3/1/4/131453041/a0f6c11b10a.pdfIn PDF document text
    • http://antonio-ita.space/tablas_de_multiplicar_para_imprimir_del_1_al_12szxjm.pdfIn PDF document text
    • http://magazinrf.xyz/my_at_t_tv_phone_numberjux8h.pdfIn PDF document text
    • https://monopulo.weebly.com/uploads/1/3/5/3/135311873/romadonovupisoguxa.pdfIn PDF document text
    • http://parkji5x.xyz/apa_citation_guide_6th_editionya80g.pdfIn PDF document text
    • https://puxikatekeji.weebly.com/uploads/1/3/2/6/132681322/f6790d7.pdfIn PDF document text
    • https://joxegozul.weebly.com/uploads/1/3/1/0/131070165/a2670f43f175.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/0bfc397079df.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/f4e0b7c977498c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF69 5100 bytes
SHA-256: de103a860585fb19618bef67f1ad442e5fa4ee484d7c71dcf07b35fef74fb71b
font_01_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 11536 bytes
SHA-256: 2e4d671946d43cdd27707ac1d0e3230f83fa5c08258413d8922254a610b87e71

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