Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d06800576e96c8c…

MALICIOUS

PDF

104.3 KB Created: 2021-05-02 05:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 596cedafa2bcf881f33df07c2952b9d2 SHA-1: 28f1c2b2a3b118f9f6fb54b4e8ccdec2715dc536 SHA-256: 6d06800576e96c8c6857cf1194177d6e3479ac9411e805425d54887936cf375d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to art or sculpture, aiming to mask the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=what+are+the+two+types+of+relief+sculpture In PDF document text
    • http://kepuxom.mypressonline.com/600493979.pdfIn PDF document text
    • http://wusapibixabupak.iblogger.org/17352470468.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/zefuripup.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/introduction_to_approximation_theory.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/c082d0771e.pdfIn PDF document text
    • http://wepojame.22web.org/sears_craftsman_garage_door_opener_reset_code.pdfIn PDF document text
    • http://rigametovezo.22web.org/boxall_profile.pdfIn PDF document text
    • https://gemiletux.weebly.com/uploads/1/3/2/6/132681217/laxiseluzivi-zunij.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/add_png_signature_to.pdfIn PDF document text
    • http://sosunimepewe.22web.org/60372208303.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
    • http://nuluwajewugutik.onlinewebshop.net/bosquejos_para_predicar_en_celulas.pdfIn PDF document text
    • http://peworesafasar.epizy.com/71525171523.pdfIn PDF document text
    • http://bofidimasep.rf.gd/bram_stokers_dracula_full_movie_watch_online.pdfIn PDF document text
    • http://lofomaseforuz.rf.gd/20129887362.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/supac_ir_guidelines_fda.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/generate_from_template_c.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/63717391340.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/adobe_reader_free_version_8.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/kumogiwedafuvo.pdfIn PDF document text
    • http://kodubinajanefuw.rf.gd/22383623955.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBD 5088 bytes
SHA-256: 8bbb4509a6316fa261642937368e9a4778ad2493fcc97863df65c9fafcb09c4c
font_01_sfnt_off00016141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16141 10660 bytes
SHA-256: d96a797f864d735f06fe61b977fbb0a252cc366ad645dfdcc6b15040bfdf87e2
font_02_sfnt_off000184f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184F9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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