Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4ee393bf795dd7…

MALICIOUS

PDF

99.2 KB Created: 2021-06-25 20:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 906c4673f71bd927a795d2a7e335a557 SHA-1: 2cde89360a3ac600cf99320c9bb789107c48b3b7 SHA-256: 6b4ee393bf795dd76e8bfcbbd6ddf8c2324bd56b33fb85ba30af3157822bcbed
96 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the structure suggests a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/hptd4h85ob542qi830jfsqsf1u/xemulitisewofevogolufas.pdf In PDF document text
    • http://zkojicin.cz/userfiles/file/50977216840.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c966451a3a9---76070801089.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b26d2764---49681831314.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/mopamepafugojidorapelova.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6652bdb3---gabaputedisipodategit.pdfIn PDF document text
    • http://artospace.com/pics/file/6973578745.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0fc65337f---famikubapati.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca562a9521---36094219571.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/66427639835.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871acbeb758---vekivinob.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1c89312c1---sedewaxeravimiretanagifup.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/laxefarupumeruzodiva.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1440780ab1---regewoligawifiloto.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/mikilev.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/24e83db9208a85e322573cabc4f31ba2/rogebugifugevaduxus.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c326e560677---gonizebefiwux.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/febofebenomorapu.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/62302591257.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608629d9e37b9---wodezusotomorevu.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f89585093b274bc8bbd99d95883c5929/zolupofafiwubazozenidesof.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075861aeb4b8---kipetigiliziruzux.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/jowozapikozegilubujakis.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7c4c6c2f---tawatajunafafavikitukabup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=jogging+in+tagalogPDF 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_off000120b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B5 19496 bytes
SHA-256: cbd777e973c411565818ccd18794c304abbf5209c5cfadd494c51a264220366a
font_01_sfnt_off0001519f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519F 9876 bytes
SHA-256: 7b120e1f218e89eb65821b425792e766b9ab95a6eb3c894d433cd03d3466feec
font_02_sfnt_off00016778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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