Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e5f5d3b0b6e6d7…

MALICIOUS

PDF

86.5 KB Created: 2021-08-01 14:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 225024e6991f456f6f589aef450b5c1d SHA-1: 6c562e40a3dd683f8579742c91e6f315f639ac14 SHA-256: d2e5f5d3b0b6e6d77533732953d20b4c4036c80c9ee71371fb28534eae7db352
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed for SEO manipulation or to redirect users to malicious sites. The presence of external URIs and link farms strongly suggests an attempt to lure users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://krisoc.ru/uplcv?utm_term=how+to+draw+a+pyramid+easy PDF link annotation
    • http://aodaibooking.com/FileData/ckfinder/files/20210605_A5AFC69CDFE96A44.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daece3477e1---wuraragulewolidasa.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/givuvabolotafip.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5222f74eba6ee5c09ac718fae5a464af/kimovupaxebunojokelop.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/dekudixevifaburugotuzaban.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/75157983723.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/purofovufezodebap.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/7a3a543aa898436febe24178d37b8510/62069107278.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607881959f7dd---49351054118.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/rexiduzotuvagawewezazel.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/abc885524098cec614678f3eb1214357/wutuganurafitobutegebosiw.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3087ed00b8---vidafoxutid.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/lorevasuso.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608af200b1c77---zezejumolavejisexubeje.pdfIn PDF document text
    • http://vhktn.at/images/content/files/liragekekosavamulidura.pdfIn PDF document text
    • http://vina2002.com/uploads/files/12982988695.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/b0ca0e2d043046e5f8f0a3ea82526ada/vorelokuvidawuwan.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/roddggou5g1r4uc8vuppolp55k/59224125924.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/da0f37e35aaa6ab36a68c65e7dcbec66/powekikifizos.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/58869259156.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/vovafosajudolarojakitozof.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_off0000f09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 16644 bytes
SHA-256: 659f40bf28a13f81d2bac9f47b316d87811c7b7f2c5d2da69a12a646a0f33290
font_02_sfnt_off000133fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FB 10592 bytes
SHA-256: c1ae387e99397b7afedf23baac48aba1702f33bfaa6dc7d044534e7ae5181ab1

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