Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd31fd2305ff8749…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 18:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3a578694e9a260a9dd9e343b62fc584d SHA-1: 67cd07fbfb0e44357672678c9145a3f977bca7d6 SHA-256: fd31fd2305ff87493c9c9e0447a3b08b960fd39a270a0a046300ade7ee4da89e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially malicious PDF files. The presence of numerous external URIs and links to compromised CMS upload storage suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/99ul335osman1ufas2lbs6fiq3/wetuniwefugetojeta.pdf In PDF document text
    • http://indago-rovigo.it/userfiles/files/92999936464.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/xavowusekirupevilufofose.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/13629467777.pdfIn PDF document text
    • http://fields-on-earth.com/22752894689.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/lolagetekamawokixabasof.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/2e0550915966e1b199717a70ff2218cc/sesedofironafezaledagude.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f396ac66b4416feedd5b1c6dda467e19/kakivamezixewiwe.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/28500878276.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/40c8f2b0435a94145095ef76fee567b7/govapunu.pdfIn PDF document text
    • http://juha.be/_files/file/11886962726.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098806d81cfb---zusajuvolesinoludanulug.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace846717e9---54732679158.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b384b066a---togema.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/ba7c00f83352025b0084128f2c518bae/pozazat.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080146472fb2---muvuronaronewakevut.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaceedd5782---mimapivimotenixal.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c186d43f9e---77475140489.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3512b906c---vabafa.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/fipipixikejuwiva.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/19937544609.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/klqcicv9i8ge1b4r5j28ld5fht/fizevuba.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b1f74fe49---lumevififuxawad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=bow+wow+betPDF 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_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 18980 bytes
SHA-256: 170e1eaa286e2295c121de861a69d8986066e869ff8720eb98902860a1b91384
font_01_sfnt_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 9708 bytes
SHA-256: a95652b7ab733f5277cad3591db8c6a9dc90f38bf355fbbc704b8ca4973b1a1a
font_02_sfnt_off00012438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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