Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c934d7aaa83f9d…

MALICIOUS

PDF

87.4 KB Created: 2021-07-21 07:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f9e9b3972e9955e21bdf71e81f2fad75 SHA-1: 06733362dfd7403f2ab4a007f43c7811a8054bac SHA-256: a0c934d7aaa83f9d5c9bde81d4c9c22003c9f2cdb2336b4f1cac30e2c506c6cc
156 Risk Score

Malware Insights

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

The PDF contains a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mfdesign.hu/files/file/gagudutabobep.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd14b7645a---rotixitam.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/82155872688.pdfIn PDF document text
    • http://gtshotel.it/images/file/tegutepadagafurix.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098881d81b7a---mepetalof.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/govirazelu.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/36315791885.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/getijefopusudota.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/09f9a55e237082360c065556a28bd6b4/43069690229.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/jiwifunuwe.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/watofuperarazabamifufen.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052518251273499.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/90425920267.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070afbe9004c---karodigopunitulifejufaf.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210721023724.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/73376444012.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/tuwufuzuzubusobefimedim.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/vegarunivuki.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/zavovoseruzeriwemedagefim.pdfIn PDF document text
    • https://hssanesteban.cl/files/joluvisijedi.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e0988e9db---likejoxepuzoziditetupin.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee4651f70f---86056161002.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/74340462074.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/63387722190.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a4886e8c41262ef59a3d051d3fb561e2/neduxugekevusitega.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/c6d3c9c918a6d56e9aad181cffff1bc1/48611143135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=watch+jersey+shore+family+vacation+season+4+free+onlinePDF 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_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 17148 bytes
SHA-256: f8ed4b95b03ede32b6361ca3bffacef4cac8e16b1fee1606eb0c8d3972a2fa66
font_01_sfnt_off00011e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E18 10984 bytes
SHA-256: 3df373661cac64225e3da7f78031895b05f3fdff2ab85d4e7849332900537236
font_02_sfnt_off0001377c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1