Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda0d230298d47fe…

MALICIOUS

PDF

88.8 KB Created: 2021-07-05 20:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e179505be6a30121d6c19a7ea30d2cc6 SHA-1: 37c1cd4aa05dd4a0525ce32542ee2366cf1fd306 SHA-256: fda0d230298d47fecc1455ec2c5ec8ede1e035b7149961f2edc51f02a751d9b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. The presence of multiple compromised hosts and the nature of the links suggest a coordinated effort to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/pegf2ioqqek8ju1v3o8hmit3bc/ledexejik.pdf In PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/54872796939.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aecf4d8d0fa---rilijowarid.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/b5aa38f2f491322be2ef6e99625c518f/6633514096.pdfIn PDF document text
    • http://cortabellanews.com/userimages/31159913188.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da00b934ba---24835123347.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/f181a6b6423bf1456032429b520e3d0d/kejesopateredogini.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3bb28c96b50a1b21fd3337172a0012a1/84518377315.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/oiafho0gveru2k3rircc1hgp6n/relarudojo.pdfIn PDF document text
    • https://susta.vn/userfiles/file/xaruvifimunisesivofap.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/dilesozivowotezesifi.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_B19F3A8429176CE3.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/xejusosomojivakuwe.pdfIn PDF document text
    • https://studiorampinelli.com/file/tutekes.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714b9d8374e---rolowojifoboximoz.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/tesepejukapekiw.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021060813165880554.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/5c061805ab7e7882284a6f65f2006853/27466075258.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/38af2e33ebda2792ecef9363e4d2cb0e/kolafosegifabixi.pdfIn PDF document text
    • http://renovator.cz/files/file/ludano.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8842a192acc561262cec468530a7ef1d/bumujeso.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/rt3on82uscblni2m71n462fplm/48127108987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tying+a+bow+tie+for+dummiesPDF 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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 17616 bytes
SHA-256: c6c915403c103a83adf3d9f0d3481c099e183d2542887c027767c7517e281672
font_01_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAB 11052 bytes
SHA-256: a8ef4669f08bb25a7fd00f67067ae119d0c2e71c56c138f32640b0d4cedc9e39

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