Malicious PDF — malware analysis report

Static analysis result for SHA-256 008396d3b53815f8…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 19:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94ed313e29cecf57317b051bbbe9d346 SHA-1: 1b8a3cee6e96510da2a6164da18a5f8b7f899de6 SHA-256: 008396d3b53815f82350f0661ff1419dc43e75acb72a207a792f54c9f2f638bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or use UTM parameters, indicating a link farm designed to lure users to potentially malicious destinations. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URI heuristics and compromised CMS upload links further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=emotional+intelligence+book+by+daniel+goleman+pdf+download PDF link annotation
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/39744b5eb3e5b7183c89c80a5e2b9c79/24755010227.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/6903578370.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/kafoziwixonafep.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/32453623723.pdfIn PDF document text
    • https://semut73.com/contents/files/23420207500.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///14272375335.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/24647489105.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d5bdb7e620734e2088f8c67db9a2a153/88083089161.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/747762c57897fdf7aa3f9e7414ebd7f6/9300636000.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/nubomeluguvagufibaxod.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bh8q44ucmrt5djg1gmom70hrm4/59150814141.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/4775339491.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210908_7CAF4B8B16E0192F.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/42131260743.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/70786491085.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/tedatelosekonak.pdfIn PDF document text
    • https://unosms.us/userfiles/file/85098574900.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/34658565679.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/37522161289.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/444e9d0a6c3a3160b2dc1ad34ae2fff0/87185348335.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/gupilikupogewudinoloxex.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2f8baa06f---45816642281.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/bumitositosimoni.pdfIn PDF document text
    • https://mar3ol.com/Files/files/69706053855.pdfIn PDF document text
    • http://m2m2design.com/userfiles/wefufa.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_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 19592 bytes
SHA-256: dc2d2caa4a3839624956ee7e8e2e7350b4887b9af6af1daa6035e971a30a0261
font_01_sfnt_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F6 11112 bytes
SHA-256: 23c6ef965edf46fdf7cac7493774841520495a5efd98166f3d62ce64fac25e5e