Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bb05cdbef7cac0…

MALICIOUS

PDF

75.6 KB Created: 2021-06-28 13:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1dc54e8d5e76525b92dcf8319b0dbfbc SHA-1: 8a97bf15473cd9df2e53404f75f03e1fad3b79af SHA-256: d5bb05cdbef7cac079bd2bec34b8e856a7e94c69bb05cc20729f3719c81479c0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites. The embedded URLs suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2dee2d99b---49734494730.pdf In PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160707e962235a---zavesuvasisoda.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/33593698613.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c6c8ad5c17e4bd9cd77c2a004e15ea72/vatekuzawupi.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c3731d5b57b023249309435997eb51ea/20756175153.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050606445069.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a49b5c988---wotefaneseku.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a018e45592e---65140587596.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/212767816.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/42764460862.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/kevuwejaponenir.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65de99b6b2---84773374056.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/f0u7hmcqclc1pggic95jj3qtj6/72577929578.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/61532778472.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/10378898540.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/norupe.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9fd47b6a68bb832e9fd78fbf15366f70/porol.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/serimatomokewodidebofa.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/sarojujebuvolos.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/xopanabekopadawimudonu.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20216763723579.pdfIn PDF document text
    • https://mmszke.hu/files/file/61735013968.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/4aj08bfec7ll14b4eiqudmcivb/fekerexevikowopipep.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d943a02fb86---12970634300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=to+be+hospitalizedPDF 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_off0000c6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 10448 bytes
SHA-256: 7e4d02cf5ca7d751a7bac123767bfdc811454f480cc71c484590a67d9edf0950
font_02_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 16524 bytes
SHA-256: 314d45221d7e7bd00925b552c4d55c49b48cfa81a881a353b93eb25409b2be5a