Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed5774faef47b4c…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 22:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 63dab5ad6ad98664669d48e7a8677ff7 SHA-1: f28baa9bf156773f9f81a86a73ae9d3b237296dd SHA-256: 2ed5774faef47b4cb0ad40b8fed17b87c9bbdf44f0c7f4712b35480d919cda05
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cructi.ru/uplcv?utm_term=future+hack+minecraft PDF link annotation
    • http://jj-metals.com/userfiles/file/2021090316190473499.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/30916007997.pdfIn PDF document text
    • http://axwelindia.com/uploads/33172535488.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/60969264392.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/jejemuguzamet.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/puvumedinudivuxafefanatog.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/fibete.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/posurekefixadoxupuwizogik.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ba9deb811e5794c9f11e10172796c2d2/86984794117.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/zowojolebetobomudu.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/29176515575.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/bakegef.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/81640567389.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ca7e57f77---64144611174.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/7453390279.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/49319981705.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea4c2532a3---silul.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/49087382931.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/39818595694.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/86821294451.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/12902721819.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/39803106528.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/55163568265.pdfIn PDF document text
    • http://skomi.ru/img/files/file/81730907753.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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 10436 bytes
SHA-256: 238a1a13e525090ad8c48690e28efa589e2ee546ce7f02e6106fcf5f07f59f7d
font_02_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 17484 bytes
SHA-256: 954f632aa10bbe93551a623772c9164734f4127846460e3226a4277889a166ae