Malicious PDF — malware analysis report

Static analysis result for SHA-256 22594ae02bf1cc21…

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 02:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 92f6300962a665f74f66387f576064e1 SHA-1: 9e96fddb356afaae0d53579d0ea776ada575a55f SHA-256: 22594ae02bf1cc21b622caf59d5f9d3eb1e706f037b08e05039f07f27b53fc75
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0f6d6fae---57579954848.pdf In PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/vuvigudakebaki.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbd6ad9e02---57869480271.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/zamikonamataberepo.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/69306584294.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104b3efb2a92---83755413174.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d4d45b2e---98054820200.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/30113214889.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/92442537009.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/61602271537.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/lafategedufoporoxibok.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/wilokisubo.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/8f04bfdf7ac95541425d9fbc93b8dae3/pulixexagewozaroso.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/cfqlg4pcrn91lncv1m3j78lh5k/30289642300.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/mufepibune.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/relepukokoputodo.pdfIn PDF document text
    • http://lovesenergy.com/file/76094550773.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/31424511544.pdfIn PDF document text
    • http://beiks.info/public/file/zatenizomefikelafovefa.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/taxokoxoderumetawujizavux.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98689218464.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/popej.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/11348512458.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27165fd27---nobujunesoweledo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=adegenet+r+pdfPDF 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_off0000cd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD16 10064 bytes
SHA-256: 57984551d9476ea37eacb53a3b7716e1ab3f7f60aee9ca8ef468819c7c056740
font_01_sfnt_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 18440 bytes
SHA-256: 4809b8307b7825bdbfc372ed7447ccc1135c9ec3b76fbbabb94c1c10be06385a
font_02_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1