Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a2e552e4c4c879…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 03:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e2d1028fe5c6f06fff75d6f885c1548 SHA-1: 4f50323fe2e2529deda10c92e87bcf9cd90b856a SHA-256: d0a2e552e4c4c879d218fefca1ec2791a146660482fea77c7cdc8c2b37120faa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The presence of embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites, suggests an attempt to redirect users to malicious or phishing content. The document body is heavily obfuscated and unreadable, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://huntic.ru/uplcv?utm_term=gta+v+xbox+one+phone+cheats PDF link annotation
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed1906d4a2---36581132772.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/96892136131.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/beguxupewuwixosaw.pdfIn PDF document text
    • https://labelmarket.pl/data/file/70334511943.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/bulibisozoje.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/datano.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/9230223155.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/76320c7ab5e26de8374d9db48c316695/jiwaludavizimedumeziva.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/74045401401.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/36212617319.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kelaguteg.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/49660316485.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/vuxakijuzasorabititivunid.pdfIn PDF document text
    • https://phongkhamtamthan.net/uploadeditor/files/64309169805.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/18332003843.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403cc6e07d0---68942540952.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149af604a58a---sularekupigasek.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614fbe2a8b8e5---12474328128.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/16356806444.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/gujuvos.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/sigasenopuloro.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1465754607614e126e5c7bb.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/xegiwawewakonop.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613670e235a38---fabenevefoboputogejofej.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/11654731307.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_off0000b1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F3 14500 bytes
SHA-256: 6d916ab2dad06549839c0be42e63215ca9658d698998384479f585e91b7d17e7
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10580 bytes
SHA-256: 950afab314308b1b45e2ee050167290b9615ab8e456755605d4c416538866d07

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