Malicious PDF — malware analysis report

Static analysis result for SHA-256 5666a3a6d835c4a3…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 14:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 996340c1f01a2e16fad28a418ef3d2fd SHA-1: abc7316ecfcd91c21d5dce9d64004052e3492550 SHA-256: 5666a3a6d835c4a3802a2e4034fa8c34cf99f2f9f75914b337baeb8bcc3b954d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of a URL with 'crack+for+foxit+pdf+editor' in its query parameters indicates a potential lure for software piracy, often associated with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://commandhousecreations.com/uploads/files/17053326739.pdf In PDF document text
    • http://adams-gold.ru/archive/image/file/23397736507.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2eb9febafaf4d7e40905d49ee501a665/47476872206.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/gukabogosab.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/zofozuxigefapilededowuwim.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160720556a9ee7---345278006.pdfIn PDF document text
    • http://ruresept.ru/files/file/72762560816.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/313096a3c0b38601c02693a8e359f363/zejujikazaxerorosa.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/kupijugezote.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c299820ec7c---85842537017.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/5559492672.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607248a68b13b---figafarejalubojofisu.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/86a2f0d55f6df77ebc4387a53319d028/zobizerudedutila.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/l1u6t6494a6hakh09uhdd31kr2/38798363051.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210503024656040.pdfIn PDF document text
    • https://blokhol.com/upload/files/43334930694.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4a15919c0908927b61d4c77715acfd1a/zebupimisiwutet.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4faed8129---6108743955.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/sajizaxoxox.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/334897299.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/moxulavowemukinewusir.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855774b9d91---69521991663.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/98514428287.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/wokapojowomoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=crack+for+foxit+pdf+editorPDF 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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 10520 bytes
SHA-256: 5e6e2c8b1642fc544061764284a8c1280181e22fa8e2be09f2645436ed0492b9
font_02_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 18104 bytes
SHA-256: ef7280c42c7497bc8c19b193826a829d9f3dee367a92ef602e4ecc9a672dc071

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