Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f4559e275c3651…

MALICIOUS

PDF

88.3 KB Created: 2021-07-25 14:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5ab4a97e7b3c9fe01c15395cc15a407b SHA-1: 4fccd376e3abe60fafafe177d7dcd7e491eeee50 SHA-256: 07f4559e275c3651bcf35832221785d7d8196090b61e856c76f408820aff8a9b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607307227f3be---68012009184.pdf In PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/db1a15642dba44b13dfc412c71efbc01/tuvalajetikoxuxulelu.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/82495874921.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/17650173185.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/rupowegi.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/61365194604.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/lunip.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/vezitimadizubekosim.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/223d7c398d3c7505bfecc7a369c79063/nefiwomurit.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9a894d26e2672ef6cc5ad7c3e1b08866/tujufizoxotexidirugabu.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/jiwezalusakem.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/luruxubutubarijiladev.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2kdor4iaqr34vc3mmv39hchql7/64275077644.pdfIn PDF document text
    • http://yuha.be/_files/file/xunesovapotefoxedonamav.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/luvasamolugaronevaz.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/78026186542.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/kapiwe.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/476fc1994021c510a26383232f226398/17474089464.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ecd21127e71add5048917494e6db439/44178896685.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60cd50195---jozirofobadibijut.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16095c08460c7e---84750402120.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/fotovuvozala.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/15772761657.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/65315285006.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/bapeve.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/lurogoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=multiplying+and+dividing+fractions+worksheets+grade+6PDF link annotation
    • 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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 16664 bytes
SHA-256: 43278bc537754a8759656438933ffb8a6bb1e131f6a04ed870a9dd35d2a9fc97
font_02_sfnt_off00013665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13665 11520 bytes
SHA-256: 55c5b13f6722e9e74ca1385a4460e199abd14dcac7d14a7c1866d19833472b0b