Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f0401296c3a2c8…

MALICIOUS

PDF

77.2 KB Created: 2021-04-26 00:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cb9e78f430bc26215d1386f4530a5e77 SHA-1: 120a3aa63053aa66afcb4bd5575747edcc8758b6 SHA-256: 66f0401296c3a2c82f0ee80bab9db6646fe85857f5fe2931550d2671dbfcdd2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=which+generation+scarlett+2i2 PDF link annotation
    • http://fezufizibum.mypressonline.com/rukikanakawiva.pdfIn PDF document text
    • http://sewonmedix.ru/78188135655o7xo8.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/dizuzuja.pdfIn PDF document text
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/5df84a8.pdfIn PDF document text
    • http://kokoponabile.iblogger.org/wegumujogupinogokapor.pdfIn PDF document text
    • http://marafonsport.site/is_wool_flammablezb7om.pdfIn PDF document text
    • http://wigomufeze.22web.org/box_plot_in_statistics.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/unidad_1_etapa_2_ws3_answers.pdfIn PDF document text
    • http://teaapple.space/lectionary_umc_20202mazt.pdfIn PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/3025552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wurunuj.epizy.com/capitulo_1b_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/contract_of_employment_template_doc.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/philadelphia_zip_code_map.pdfIn PDF document text
    • http://wawopuviginase.epizy.com/togamikowisuri.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/maus_implement_russellville_ar.pdfIn PDF document text
    • http://bemedaxo.rf.gd/pawexadawalogokani.pdfIn PDF document text
    • http://vaxavapokun.rf.gd/mujibalekidudepijo.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/54681173943.pdfIn PDF document text
    • http://guzaxugevogifu.epizy.com/31762798117.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/39931196506.pdfIn PDF document text
    • http://gabigirinekib.rf.gd/70470661343.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/folowalutun.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_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 5208 bytes
SHA-256: 6fb278429ba4d14d1231c290aae09ea80032659c86679a46dfcea31b4972eb35
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 11316 bytes
SHA-256: 4a6333fdd12a228ce6e557b8849d3e466de42f7a73e8c8ad2c7ac42f24facdfd

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