Malicious PDF — malware analysis report

Static analysis result for SHA-256 db56264006556e6f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-26 11:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 1d7128211026259d60d7eef7bdd15853 SHA-1: 32ae4e9becb704cfd67bbedadb1db59eeeff0394 SHA-256: db56264006556e6f36452abd99ba9c4543642475aa463c81814c8c02cb671748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'gift card generator' in the UTM term indicates a lure for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the phishing and potential malware delivery intent.

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 https://coretry.ru/uplcv?utm_term=e+gift+card+generator PDF link annotation
    • http://trustarshida.co/cache/fck_files/file/wetuxopabubamupil.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210910060035.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/penexagolirijetabuli.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/76215066199.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/43440123159.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/faminixinexutarikut.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/23609211778.pdfIn PDF document text
    • http://ausafe.net/images/art/files/99147252334.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/rezibet.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161306d3c5cfd0---numudajabubepafixilotu.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/59986312967.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/rogenokimitapumog.pdfIn PDF document text
    • http://lex.tj/img/file/86817316788.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/tasezekegokurejovezofus.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/97788957067.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf1cf61219---tefixoxenaxenorudux.pdfIn PDF document text
    • https://finliz.lt/i/File/17745431749.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/vezolofopufegaxuvugiruk.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615031549a012---25502026765.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/pimexipinorewiguwuwexezu.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/32rppa8hb88n2vkm337s03u8q7/33807387037.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614adedae5050---20759783636.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/zogibofupanuveban.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/74012467989.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wuwepokakizomevolumekem.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_off0000b49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49F 15880 bytes
SHA-256: 04b6e361da2a01efd462afe1a158b5d927404998678d99ca1c0abbf3b85f6934
font_01_sfnt_off0000dd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58F 10420 bytes
SHA-256: 48eee3cd7883d04ff3a59b917d49f5b00f48fc0353f6eb735b7dbe2e28c1590b

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