Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9e6c91a45dd425…

MALICIOUS

PDF

86.8 KB Created: 2021-07-01 10:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eb8e01af11b3eca579376d62152e86d1 SHA-1: 60a65eeb505452d109e0cb6244e17967a8509b30 SHA-256: 1c9e6c91a45dd42519a240a845ccb5832110f01b8d43a44f8dc09a647df40654
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://olgapolyakova.com/files/files/wejupikiramotunav.pdf In PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/af8437eea14caac827018cae545ad792/niwumonovitus.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/9754742449.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/nabumunibasesa.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/japidaxasidufedesa.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/36777409615.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/dorekasevowazopezevufuf.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d42a3e9dd---11052546411.pdfIn PDF document text
    • https://mmszke.hu/files/file/67058679483.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/51156678022.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/4249151185.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1e707a2a622273fbe409199e989a5406/93287328195.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcff35d74a3---nolafadefegejatavolufa.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/56986269050.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/69001775600.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/224g0g760bt2b924dvc7ci6hmn/68377479045.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/2445481035.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/nuwexo.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5ghoblj3tur70dicm4nvq80j2r/95741039589.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/gimuzixomek.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6afac3bb---posifufotovopisejufuxewew.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5a31836dedefc8c197e3e867302b6df1/64092634649.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076e5f6d07b2---petesefugopekifoxapexowi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/a2fee4qr35k2t629gnd5at5o05/levezurikukuwidomivaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=if+you+already+have+an+associate%27s+degree+how+long+does+a+bachelor%27s+takePDF 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_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 16992 bytes
SHA-256: 1cd202008ac7ef5db61f5acdc56a0a439b6d56cace0e1aae96635de1de7cf583
font_01_sfnt_off0001188b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188B 11340 bytes
SHA-256: 0a7f8728102f77d500011143b36bab405f655d175a74b119d3eaa8eb4aa8252c
font_02_sfnt_off0001331c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1