Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba5498ddeb4bfb2…

MALICIOUS

PDF

93.6 KB Created: 2021-06-28 20:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b9f42ddf61645c997a0105ca95f6c36 SHA-1: 2101f99c64e4e0b5db011923ce3153feb677d86d SHA-256: 8ba5498ddeb4bfb2a0f08ce9427d520ab9bf57819ab09e80a97436b761ac54bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sisparts.pl/zdjecia/fck/file/82588694731.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/our25fvt0r0b737c8hc21956p4/46546892886.pdf
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/befadorabawijejen.pdf
    • http://ekolojikweb.net/upld/userfiles/file/77148745630.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa43035749---patasujedalikikakatekasun.pdf
    • http://talani.nl/userfiles/image/file/dasadanesemimu.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851f3830ec0.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe544dccda---xutujajuvatojenamo.pdf
    • https://appvid.eus/userfiles/files/6554043373.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096a435ac60a---nudamewiba.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/274a00202811a0b1b016dac7e107f949/luwataregoloni.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/csmen8tvpeero3quplv7tkkot1/dokoz.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a387e1ef94f---60309575147.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd2f66a0f---24700704499.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea62265fe---gadivogumimavubuwaxanoge.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940ea9c2d44---85915863220.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/uf1rnpnio4iamgb5oajkreifo2/dunevogotojodepasedaxidor.pdf
    • http://davidlbrooks.com/clients/868292/File/76289625800.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb134d41b6---wivibifefiduliga.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6fb670d72---vagaxevanid.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7a87fdca---81475391560.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/81988712929.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ec5631i8v40tcenhnjgg9nu5ss/sokanoxi.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608727291a0c1---zenopimejufapofom.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=i+do+not+see+idm+extension+in+chrome
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af8.bin
ce7176af990c25bb94e4c13fc79b9f869e20b53f49b4111637f4d22691717d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 17204 bytes
font_01_sfnt_off000137d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137D3 16792 bytes
font_02_sfnt_off00014fea.bin
fe3651e1e2340856eb83d6f53b2c308a8ee358c043f272496ee6295f65508c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FEA 10480 bytes

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