Malicious PDF — malware analysis report

Static analysis result for SHA-256 9baa7650bdb18298…

MALICIOUS

PDF

86.5 KB Created: 2021-09-13 08:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 255048216d64c51b84f164eaeb76759e SHA-1: 241926c5157fd64d22c07a200d802dfcb2646b52 SHA-256: 9baa7650bdb182983dc0793321010696e433dd19fce6f05ea23c802f1990ff46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crewmak.ru/uplcv?utm_term=how+to+open+sms+backup+files+android PDF link annotation
    • https://osikovo.eu/webroot/img/content/files/pagonekuxudukukodo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/478b4e6fdc423f2e41ba76d485e734a4/70642826015.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/kexutasizonegezezej.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/bakidojewov.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/vugot.pdfIn PDF document text
    • http://ge-mak.com/files/babosonuwa.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/62657766133.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/pototanadevagokobutuva.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/japitijorinelijoridoledo.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/7985531541.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/fesaxalukadajavu.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/verozu.pdfIn PDF document text
    • http://cwesp.biz/upload/file/99514859319.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/jusawuketawanuxanig.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136d728a923e---futudufap.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/49418de203b131f1efebaaccf8269591/6423432704.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/19481166570.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12ab73ed5---78386048417.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613867e38acb3---pakalomawabuxasuwi.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/lananovobapo.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffce840ae8---wiladulajada.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/sinasojelimizob.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/dadozaxibolagowe.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_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 16912 bytes
SHA-256: abf2a5006f7fe5da9057e87314f1383902a26f633f0624c37a2e0db6f0f4cec3
font_01_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13232 11188 bytes
SHA-256: 3883a184ee9969f6fe36e0b13d9c83ac7b246b97930702629a0dbe755e1b81b3

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