Malicious PDF — malware analysis report

Static analysis result for SHA-256 1011f0e2a188422c…

MALICIOUS

PDF

89.2 KB Created: 2021-07-03 09:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2ba572439f47e736eaf52f20d309155e SHA-1: f090604c33534a2a054552d7704c972e5c9490da SHA-256: 1011f0e2a188422c00f53e19d4cd0f3cea90de8ad6d9aa5279ac63c9ed32ba1d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute a payload. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d5e5ddda8dd3c3cfd7e0cadf7e2747d7/nadajarujemakonizola.pdf In PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/ranimodosi.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/debabepakozirukapidanil.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/sugobulupozo.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc5fe135c---zodawijuvesetabibezux.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c439281b0b2---33660898893.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/zesone.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608524a3712af---duleg.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/jogawa.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/jixoniroduvipodaled.pdfIn PDF document text
    • http://stylekd.ru/files/69952514445.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec91bb68db---96082484286.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089b02fcaa95---42486164481.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/h340382k46j164uk45htcd75nl/tewum.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/14547181931.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/69f0nhkpo848262hklhqakqdhi/67706016803.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872d9b911a1---dujakaxewajefarirud.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/tidutedokiximawefaneke.pdfIn PDF document text
    • http://jerseyshorepirates.com/userfiles/files/zulifamezakuvudako.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/5907048250.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a2fc1ac96---72303461904.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/da83d640c83d8dd7d90d01b0372a2416/52775759453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+open+strongly+encrypted+pdfPDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 10732 bytes
SHA-256: fc68d42c9b5d27acfbd4cd36d18da29647480e884ef3a9753b3e5e086144acd6
font_01_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 17964 bytes
SHA-256: dc71526800bef045c1b525d03ed2000963aa4d1901d4ce909b4545bf3ce05df1
font_02_sfnt_off00013f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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