Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f939dbf97fad409…

MALICIOUS

PDF

83.6 KB Created: 2021-03-06 10:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5c0fdfb8119be3d02cc97ccfd33627b5 SHA-1: ddd73694e2e9b561c946f1fb3e54847d43bcf9cf SHA-256: 4f939dbf97fad409a52475e52b2cf9673c42acb11af0edafd9b6b322e57eff3a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to 'The bronze horseman full movie' and includes numerous external links, many of which are likely part of a link farm. One of the primary external URIs, https://mezovuduw.ru/strik, is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/strik?utm_term=the+bronze+horseman+full+movie PDF link annotation
    • https://cdn.sqhk.co/wudawagirus/NRhehdL/66291198000.pdfIn PDF document text
    • http://donutota.iblogger.org/15999326998.pdfIn PDF document text
    • https://cdn.sqhk.co/wafepazi/jagd9jH/53200108913.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/papikaxorimujakuzelikox.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/DpehbXy/70684618216.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/egjcgjK/zevaviwunena.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/ihI1kzX/minecraft_servers_free.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://uploads.strikinglycdn.com/files/fa576ba9-3dfd-48e8-b285-23f10499e8ef/alpine_radio_cda_105_manual.pdfIn PDF document text
    • http://zokitidekav.epizy.com/sistema_politico_frances.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/quais_so_os_tipos_de_artes_plsticas.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_a83e355910a646cdae0dfdad22a4f8fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zugutixe/xuluxubipawuxipu.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/autocad_2016_for_mac_free_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/lowivaxefadiwadekuvij.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/duzonuvefadexetulodoj.pdfIn PDF document text
    • http://sexuvariv.epizy.com/what_is_a_topic_sentence_for_3rd_graders.pdfIn PDF document text
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_20b727bcfb4042e2ac091ccd47adbec8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8419d0b-61db-4419-b0f5-215d9ed30de0/zadegowikerasore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e8ea9c-79cc-42bb-8ef6-2d71d62be05c/dewar.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_6d92ecd645b5471ca60510dcbff41cf5.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_ebf179bf748e4c68878f078d446f964e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/56436877279.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_9606b854297a41bc8e3029592eaa227f.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_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 5008 bytes
SHA-256: 2259836fef98a1902daf4803a12a6903f5c9fc535b454e64c925486f39f79985
font_01_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 11176 bytes
SHA-256: 92079cb7b78a60e7916e9c79c21733aca4aaf3a605699371a59b5c19897b6295
font_02_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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