Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ad50856a97d0f3…

MALICIOUS

PDF

92.2 KB Created: 2021-08-04 14:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4742fe98b67b76a0de2ff7d3ee0507a4 SHA-1: 5e206a6212333f597913ac0ec799c86c61f47d3c SHA-256: e9ad50856a97d0f3f3827c2e958d0a1f949c80382d9f62de901b3407f1f5174e
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm hosted on potentially compromised or disposable domains. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content. The PDF structure and numerous external links strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://ketchas.ru/uplcv?utm_term=trnsys+18+user+manual PDF link annotation
    • http://www.awakohchang.com/image/upload/File/0701638443.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/94192899288.pdfIn PDF document text
    • http://huimao.com/upload/lamirujidazowogito.pdfIn PDF document text
    • https://jobtiara.com/files/files/31355536179.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/7354626782.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/4605226865.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c83dc873b9---movidibalesup.pdfIn PDF document text
    • https://daismene.it/file/fopepovagenitepalud.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/suwewokifefaw.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jmak75rftg8an90nr0llo0mv7h/46068026401.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083988062d75---gakifuvunesubekovemosuxoz.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0c68146fe83a624e2207bf4f620ac08f/15336441602.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a06f112d1---fineluritemufe.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609871cfc1f3f---86267368377.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/lamutetuwoposixatawimem.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/futokumabokubope.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160753277624f5---zabaxe.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/s0a95tlnkq1evat4ua7k5esh8e/67443890134.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/930d3e74291f02b8062029d32367a9f8/kuvelerefalabu.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/ef3e3a3234dddf85b1e1cf6ceb4b10e6/71141445912.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d381f95997---42044177823.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609708ead21ae---45806365568.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 17716 bytes
SHA-256: b4286faf80d7705f23765c388c524646028fcab4c6f43b1656fbb9fd2441efdb
font_02_sfnt_off00014b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B7F 10396 bytes
SHA-256: 3a53d8fb912d5956fce61a731937d802aaf18ac21d33b7f4ce8d2dac8e13f564

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