Malicious PDF — malware analysis report

Static analysis result for SHA-256 e369d9d3343ebca8…

MALICIOUS

PDF

92.6 KB Created: 2021-07-07 11:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 829d7c83b776bdb585e9b6bd343e53c8 SHA-1: 651108da9470378b6437f579f9238eda93e54639 SHA-256: e369d9d3343ebca89be6edf123e3c085ed6fe1ebc2ced431df5920846e4d3b03
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external URIs, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious websites for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 5

  • 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://infrive.ru/uplcv?utm_term=associates+in+zoology PDF link annotation
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791e88709ef---24116107839.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/14696222887a889aaf4d66b18fbfa169/33447541465.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/49d0d4a6765e7030ca351bcfa065a5dc/84000715860.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e22125ed---30946064459.pdfIn PDF document text
    • http://christopherdallo.com/file/66716278880.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/ec9cec349ff87fae09f925702d44bf6d/95724293722.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/758c9cc959471ac156930c22fe85ed4d/75860188424.pdfIn PDF document text
    • http://mousike.it/img_ins/files/mutapoluraranadagolifa.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/18390234944.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fac7015300---36848893425.pdfIn PDF document text
    • https://people11people.gr/uploads/File/jejegusanik.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/26b504412ceb2ddfd9820d1bebe81ceb/genesu.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/koxezizezowodujexis.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/6109aa42a87ed37ae23a906e4c188548/45923417923.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1467eb8a04---232051164.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2150bf50---muves.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b65dfacc62bcfeabbded66159a24ab81/92133901072.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b490a861d9---40310869165.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da71b5d539---pofovuzeputotavojoto.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b35f3e39f32---fomumexunitakokezezenifib.pdfIn PDF document text
    • https://autopratichesas.it/file/28026752817.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-10/20210510081105182707.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a61a392bfb0---44326142657.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/61852483317.pdfIn PDF document text
    • https://artenika.pl/fck/file/lawedonisikozolex.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://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_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 10460 bytes
SHA-256: 156b2f5bf5da6660c99fda6906c323b11ff53dfdc284ea4ac5cb26effee619b7
font_01_sfnt_off00011ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F4 17732 bytes
SHA-256: 37b509fcd2af4893f4a76ddb5768ae58c060bd579f99de6a0e445a57f4ff01c8