Malicious PDF — malware analysis report

Static analysis result for SHA-256 367462b38401c382…

MALICIOUS

PDF

79.2 KB Created: 2021-04-07 22:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1f298a616915102e609bdccfe8844941 SHA-1: f389dcc963d93a200f50d70bc00a6751eb86fa9f SHA-256: 367462b38401c382746975e250cbca997d726edc81c2b6a1a4a53060a1824432
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=fly+fishing+guide+moab+utah PDF link annotation
    • http://maturibcgj.space/59736492542ovr1i.pdfIn PDF document text
    • http://femusawar.iblogger.org/pezifelunasefuzuj.pdfIn PDF document text
    • http://storeplus.pro/75288561824l0pt6.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/78e5e0afedf829.pdfIn PDF document text
    • https://kesupegujofoju.weebly.com/uploads/1/3/5/3/135388852/woriluvukax_popotuz_tinumajog.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/ddcca330fe93.pdfIn PDF document text
    • http://gopururin.iblogger.org/manuale_videocitofono_bticino_300.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/page_replacement_algorithms_examples.pdfIn PDF document text
    • http://cadenalia.com/statistical_mechanics_book_redditvfu9q.pdfIn PDF document text
    • https://baxemazone.weebly.com/uploads/1/3/0/7/130739829/bfdbf03.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/4773413.pdfIn PDF document text
    • http://help-nanny.site/30023736321jipwq.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/14783.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/bajeb_zivumifa.pdfIn PDF document text
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/butosa-vimedowajonenoz-vipujodixegato-ropaf.pdfIn PDF document text
    • http://parkji5x.xyz/just_mercy_download9hkry.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/d46a34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubafurubeg.epizy.com/aiag_manual_free_download.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/neonatal_jaundice_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/google_sheets_merge_cells_shortcut.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/fisuruvasapozurotu.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/free_adobe_illustrator_poster_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/zonekasolutasinel.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/dr_terry_wahls_diet_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/apostila_arcadismo.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_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 5424 bytes
SHA-256: 3afc67e20cbfa68cdccfeb0428d28b777bb7bee8fed811e8d7d27c44597c1c79
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 11644 bytes
SHA-256: 26cbab37db2332d592e0149ace6c541119070daf00aa5bba6b343d3c7b12bbdd

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