Malicious PDF — malware analysis report

Static analysis result for SHA-256 01883f0bf6c0e43b…

MALICIOUS

PDF

126.8 KB Created: 2021-12-18 04:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-07
MD5: 0ac7a85de01cc2d8c8b9a77e71ee4a75 SHA-1: 4351231ec4310b99436ac5abbe2ae064e7543c7c SHA-256: 01883f0bf6c0e43b0a252ff99231df4be714494ab3b04bba26f4a97e02519b98
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://matao.ro/app/webroot/files/userfiles/files/22581933358.pdf In PDF document text
    • http://0048.pl/48files/file/51754941575.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/rupifumimemuxakomaxumen.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/36719555213.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/tigukogamugig.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/nawagejifugono.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/53562678075.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/89751315405.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/bubaxuvuzizubenusenad.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/gumilil.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/wosimibofujemonu.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/birudugemidenimasa.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/28254114353.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/vijexijezukakasuzogifumix.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/75713c3c732efd580ed49518dcc21a92/65962180886.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/45252915987.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16181223b9d615---kivedalozudobunivif.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6a1f640795ee0f4673fe60d64d7f3ce2/40579409639.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16159291a25474---16457990274.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/96636468997.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/395ce272b418a0c398ccb5f3d7be4329/sazaxekemezuzo.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/xejulodowofasixoxometisam.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/90318905125.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/titulofije.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d19e66b91cfd94cd8e4b77eafeda0e62/73581346030.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=what+does+a+ford+3000+tractor+weighPDF link annotation
    • 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00019110.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00019110.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19110 10980 bytes
SHA-256: 34a1b6bde36ea8d3f38d26123253eb8f5091e5712c28aec7d9f92d358f2a1cd9
font_01_sfnt_off0001aa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA9B 17040 bytes
SHA-256: c022b62010b04f2c229666cf64dd74d16d1877102c63d0352243cbc437e2c6d1
font_02_sfnt_off0001d6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6E0 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336