Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a9471af97bdd32…

MALICIOUS

PDF

90.9 KB Created: 2021-08-15 01:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 1cd7e6f2927849db0f2ac422a33abc2a SHA-1: b430e43cc36d9adc7a71a8a7a3acb5c07fda2a94 SHA-256: 00a9471af97bdd32cef8b7cd1ed360eaa9421a5d38ef3ca29dcd9c2ed1244ed0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other potentially disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://archism.ru/uplcv?utm_term=chiavenato+idalberto+%281993+liderazgo+pdf%29 PDF link annotation
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/63fcc32d65fec1df3b28522fd736a65d/56418813401.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609be04b36cc4---pibinaduwa.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a331827ccfe---77237451852.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/30697566302.pdfIn PDF document text
    • https://nevisnews.com/userfiles/55424980752.pdfIn PDF document text
    • https://skspiti.com/userfiles/files/86062279165.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///83681517863.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/15008955492.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5b425c84---93534265325.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/89774628308.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085011d8f018---vakamexugiwipibebisoputub.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/dekoroxuxomo.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/78867209690.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/5836305267.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb222184989---zunedodom.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1ddaa1c09c358fcdb58984612b1d1366/36373571077.pdfIn PDF document text
    • https://hirurgija.me//files/nufawo.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a1efb26ecf6c1675f66a82bb37f60578/towonujeki.pdfIn PDF document text
    • https://allianztc.ro/files/file/7157371718.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/70702968049.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/d22e9a762cee7be954419667264914d8/27444196904.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/39608936746.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/jomaroriwuforesopobax.pdfIn PDF document text
    • http://hoctienganh123.net/upload/files/71698039994.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_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 18068 bytes
SHA-256: a48ab53df75ddd1148c70b72a6f0e7fb2af3d1d535116e9c148d9b87d5fc9dff
font_01_sfnt_off0001286e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14085 11456 bytes
SHA-256: 2f7add6ea372b6436652a8ebc71af6540fa0143c18c5af70f78dcd1fffa485ba

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