Malicious PDF — malware analysis report

Static analysis result for SHA-256 09518cebffd702c1…

MALICIOUS

PDF

79.1 KB Created: 2021-07-04 06:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b3e164c9101813e2f03ccb870434bcde SHA-1: 1b121d2fdda1342e710daf5f3f1f0bf13cf11825 SHA-256: 09518cebffd702c1cb5ff45f2cab7076ec3d916fbddc8003618a88fdb1aabc0f
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the use of disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160743752cf5dd---pizoganofodamogudadaberen.pdf In PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/kuac5a6atqj8mm4147qd918o22/vilulidizesenu.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/fixomisoxuveto.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/85836649241.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/gijedemopekironosuzifakuv.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/524781ab0014cd16c2028989672c9a99/fabifijomexiwajapumerag.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e75d62ea6feada86817dd5bca447c7f/45383058600.pdfIn PDF document text
    • https://gilbertems.com/videos/file/27620930199.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8e5dfcd2701a85aa1c2dbc09a84f3f23/wefefabop.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b38f230daa0---63309888881.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/42473097365.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/91638323119.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/265924558.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7de9cc04---10180979428.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c5c4176cdd5de95a474c23f41841db56/manisuzadonutuposo.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/72039804310.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a27b0c240db---22711976700.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097166fdb7ad---wodajetazed.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/1838976694.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/95878086236.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0bafc2e02---pegojix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=five+riyals+in+indian+rupeesPDF 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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 16296 bytes
SHA-256: 01780435708062a29b61ade6047d51da5ea7bf3b165e7cc7b6f19082e7ac47b9
font_01_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 10424 bytes
SHA-256: 751cfbbf1b723a86241e3d3f03179448983c3e3716d76ce6400c85143803ed3d

Open this report in the interactive analyzer, or submit your own file for analysis.