Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d09bc52b4120911…

MALICIOUS

PDF

84.7 KB Created: 2021-09-08 03:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 654e6fb2b003427453ebfaa97b36a3db SHA-1: 94c1ce3d6654e05b10ce1e3d3c6487dda8d06682 SHA-256: 2d09bc52b4120911a3b97682c000ae7a4d3cf5984c79ce059b102791d54180ce
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of many external URIs and link farm characteristics strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=phrasal+verbs+worksheets+for+kindergarten PDF link annotation
    • http://daindnc.com/fckeditor/userfiles/file/89089292474.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b23fb3156a0---nomufutugezedefogupibas.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/6651515922.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160846769d1318---lakukuvizi.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907162e197b---64830162790.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/dipegigivetuzedi.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/69178608481.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf284f56b83---notawubivepufur.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/58875830753.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/rujuf.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/57656398400.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/wotujosefemusopuponuri.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/693379684.pdfIn PDF document text
    • http://stroi-sistema.ru/img/jotiziwobozixedi.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/bilopodel.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/8843701990.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/44342678402.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb22c375b---nixej.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/94977846223.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb03705f58---19790026493.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1afaa19ae---kunuzuzowuzuseju.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/91905765420.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/3808073760.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/84362009867.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/19291861383.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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 11020 bytes
SHA-256: da398d6204f6816cb42a0c476b1a8780dfa3747e0d601e490e1c0fef9c0f31c1
font_01_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 18576 bytes
SHA-256: 13f921761d314a5773b02a3b8493942a47a7479673aac73f1221ee8ed3d8d22e
font_02_sfnt_off00012b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1