Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed390d34190241c…

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 03:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d77e3d7d3b3042afdebd052780617d3c SHA-1: 7c13c70fd24449366ab6b4164f90b6e20176de97 SHA-256: 0ed390d34190241cd84f3e046df4090f0a3e2401846e067d389301cc45d4c844
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to domains associated with link farms or compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=catalogo+timken+2017+pdf PDF link annotation
    • http://remaining-mc.de/userfiles/file/fojodirawilivexogaro.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/86727844612.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/rakeforezak.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/paxelifezav.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/zuvukimowuzunexosafuwinos.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/vovebozisitodijinorosoru.pdfIn PDF document text
    • http://museeducuir.org/upload/files/78789070482.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/42441098747.pdfIn PDF document text
    • http://svx.su/ffile/file/80515483278.pdfIn PDF document text
    • http://jfe.hk/userfiles/41141781837.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607846cc458df---kuvuduzakanatozedujadawin.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/butobiwobiferunararekudi.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/69213917242.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cab444b4e644879fd30b74a5253d3223/54043142763.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c042bbb9836---laweriki.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611312072e97c---93863985462.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/pejogopolozofubefu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/gkoluhhahjapet4296d0fasbnj/95615560327.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b4dba587b081ecfc6ebcd7cd7891a92e/xagifof.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/88592949430.pdfIn PDF document text
    • http://atomleasing.ru/media/File/32303602506.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/335dce9738ddecec94caf1ddbff79878/kavevajixemovolu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73cb31f183---72539686595.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_off0000d7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 19436 bytes
SHA-256: eee78cbf1517b1d65d622aa8937829ad738478a2e4fda534e4bee429db2dde07
font_02_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 11040 bytes
SHA-256: 7f22806b31d48ff3eda7642b6e8834b38041b3946384795043008c4d5ce85d6e

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