Malicious PDF — malware analysis report

Static analysis result for SHA-256 996b27d205587bd3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-16 06:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20c73813504c49244471775f2b4f7df5 SHA-1: c5cc3a36fea42568466660630c716f9dbd28267b SHA-256: 996b27d205587bd34777cffb27b9334e3449d42c79e3aeca06eee75fd59b7a6d
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 WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://oniceh.ru/uplcv?utm_term=pokemon+eevee+cheats PDF link annotation
    • https://la-klamm.org/userfiles/file/jibabamasotexalo.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/89416150461.pdfIn PDF document text
    • http://bscartridge.com/pic/vizudabepoxanebe.pdfIn PDF document text
    • https://linardi.ru/files/file/28330891850.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/kixafuvemedar.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/pakuxanogusom.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/kefudesifusuxuvusumeramo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca7ca330cc---vawigupevupuledoz.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/81895909924.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/debakaxu.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/sisij.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/duraka.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/favisuvum.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140e63a75c13---tobokazuwagarubigoz.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161427cf987a5a---34630331514.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/zijimezopugefunu.pdfIn PDF document text
    • https://viceda.com/userfiles/file/zazeronozepobuduraj.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/6939254212.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/xafelonowowaliluvorepoxa.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/nebaxivule.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/loxupatuzijudawowep.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/12016568078.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/59037452161.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/kizojutelekegobowuw.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/98569529004.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/nuwizojujotudezusogavifu.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/97272693008.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_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 10416 bytes
SHA-256: de2fb175c7cb689b9a8cf535bdf81dad109a564f49a96c2c6359dff7c6072c31
font_02_sfnt_off0001136e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 19340 bytes
SHA-256: 8c8001b0be99da05c8e16d3e3627bfa131dc4ba8a3a20eb5ce840ed3bc4a4d93

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