Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e67d258b112a35…

MALICIOUS

PDF

86.3 KB Created: 2021-03-20 11:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c3b97faef8a2b2fdccde4469722a1fa7 SHA-1: 2dbe82c6ced27bbd47166e10851109e646af68bb SHA-256: 21e67d258b112a350613fb4bd92188a95cde9140778d8719077e8823fdc73270
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'menu pdf' and 'wkhtmltopdf', hinting at a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/award?keyword=house+of+blues+orlando+menu+pdf PDF link annotation
    • http://xoroketogejuxe.mywebcommunity.org/79040248207.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/jgdiege/52800264346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5ffabc22e308d.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/juzuguk_nasuwekewel_rajajizowogad.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/jo3ifMp/glowing_live_wallpaper_pixiz.pdfIn PDF document text
    • http://jisetatiloro.scienceontheweb.net/mafopawopumalokegojanejek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_5fde03cb1e70b.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/xuzati_popif_wopuzum_jabifajufikin.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/4286859.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/morse_code_alphabet_and_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/cShgCI2/crystal_form_definition_chemistry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_600b3c32b35df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369163/normal_5fe3893b9e235.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/tutiru-jefubugoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a909b8fe-7c6e-4467-a5b6-92e64a2a5b5d.filesusr.com/ugd/65efca_d8576b886b2341c8897225ec9cd95cc3.pdf?index=trueIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_ff54e5165cf144cc9cb262865f8335e3.pdf?index=trueIn PDF document text
    • http://segurixuzek.myartsonline.com/70_761_braindumps.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_cc4f261fee1d43be84c851f8f24777b1.pdf?index=trueIn PDF document text
    • http://lekeviwa.onlinewebshop.net/boletim_mensal_de_doses_aplicadas_de_vacinas.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_51bf0bf5acd74a849c47b0a407161459.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_dbaf5ff52eac4609ac38061aff00779e.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_12def0cc56d74b7ab9622c4999236472.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 5044 bytes
SHA-256: e42207a016be224d5bbba2a7d7e99a42c7aedea44b387498def33b0baaeba867
font_01_sfnt_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 12048 bytes
SHA-256: fc1d010ac506d60bfed5683ea3720e0838ae63bf65f38031d4f1d758462fa9cb
font_02_sfnt_off00013d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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