Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62ab0f80085a8e…

MALICIOUS

PDF

79.2 KB Created: 2021-10-06 06:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 754434d8dce3e784e361fee05530b523 SHA-1: 57f25df7281ea0e433b3aab506e8a5ded1396469 SHA-256: 0d62ab0f80085a8e7c6823173dca5976449c42da819876f3fcdaed9d2f2af831
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and link distribution align with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://laborke.ru/uplcv?utm_term=reporting+verbs+and+patterns PDF link annotation
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/16112332349.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/45637411010.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/83121560513.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/88601356380.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/0757cd270689d46c0cfe03c3e4ee703f/konabukazawodafomu.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/25370213222.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614e026b29928---31317587186.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/gipegikizisuwelivutuluvu.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/9029339829.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/67868253239.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/75309225966.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/jelopumajomiladobilozimij.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161410e172fb55---tipususawi.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/38236971b19154945012f5865c022744/tazokikus.pdfIn PDF document text
    • https://yifff.se/userfiles/file/12408853269.pdfIn PDF document text
    • http://czyxchem.com/upload/files/rezusozitelejonirulomaki.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/34239187201.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/mamup.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/lajojesofezasobozulofi.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/funajufadeligiduru.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/28918183303.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/58830913471.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 19492 bytes
SHA-256: fb6ac38f0c5079e91f8409369d862e9cf3a9629eea75537c6cf4990cc185de4c
font_01_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11671 10772 bytes
SHA-256: e0009c37547373edd16fce732eefaf066c69b3a164d7b74319f2b9a5a97326c0