Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0ab1dcb2b62ce2…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 11:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ae523ab27e87d4c9d2c1ac06eccc5924 SHA-1: 5b17d60427386c03bc0224e05c896a57d021515c SHA-256: fd0ab1dcb2b62ce226ae1c187d4089300a53e4bf7efb9d83ff77b8eb93793c8a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to multiple compromised websites, likely intended to lure users into clicking and downloading further malicious content or submitting sensitive information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=taken+synchroniseren+outlook+android PDF link annotation
    • https://sicurezzaips.it/uploads/file/19245203296.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/56600878305.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf4b3345c2---20009969460.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/2b4d6d07ef91dd6a00d836765865c4d2/56871236833.pdfIn PDF document text
    • http://rotang.net/userfiles/file/japekazefipiduwarati.pdfIn PDF document text
    • https://aitalk.vn/upload/files/91158828926.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/225952755101631575323.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/57591502856.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399492c7669---xaxikenu.pdfIn PDF document text
    • http://hexindechem.com/upload/files/59367436552.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-08-15-15-32-18.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16144daf4a60db---sifunulam.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/78762252819.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/2c2bb3b581a5eabc21e6223980c70918/8760975242.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/fudiribomumomowexijela.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/dajolorugonejer.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/vizitozajunipekozefexoru.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/mikanawinalitate.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141961a96426---punigobizirobisitalufipo.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/jopojusanilugimo.pdfIn PDF document text
    • http://4darchitecture.org/img/all/tafetemejutajisojif.pdfIn PDF document text
    • https://people11people.com/uploads/File/gofavexodiroxawogu.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/lajomudutinigifaroburij.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/38714481929.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_off0000df55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF55 10736 bytes
SHA-256: 581c47cb115a03b72d7064ef812e5ed868d30fe14d512241cf21a779b1629023
font_01_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 17588 bytes
SHA-256: 4badbe6b165d44e51abfb050aa0380d5f5360361228031f5cfe3a0124326ab6d
font_02_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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