Malicious PDF — malware analysis report

Static analysis result for SHA-256 578c06f997f79b8d…

MALICIOUS

PDF

84.5 KB Created: 2021-07-21 03:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7153657b3fb4ffc5507cbfd0fc386dd4 SHA-1: 05cbd670f6ce68766a985ac181878890f5297eae SHA-256: 578c06f997f79b8dd8ad4cb669f18826af4cfd03e57bc72f4d83e6e979f7f961
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and compromised CMS upload links indicates an attempt to leverage these sites for distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/8543ed7e4eb8787ec23f1ed0225b64d2/6105713474.pdf In PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080d895ad029---xesewedewafigusaze.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/46719686133.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/32115528414.pdfIn PDF document text
    • https://deepex.hu/hirek/files/razipegebiwanomusubom.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/20279721572.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/walexudurubazezojezizad.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/ubofdrbmehu9kgtv18trpbug25/45889507332.pdfIn PDF document text
    • https://campermagazine.tv/public/file/walotuz.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/daed5d2a631290506e5fba0f5a942634/fokuxilaziwakebujaz.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/35803990348.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fabajipozikoxisonar.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/dilukegevipikiw.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/5cfa0ac0df06b322b0ce6b9676e34eb8/jezekimosujijomabid.pdfIn PDF document text
    • http://yuha.be/_files/file/farenotejanuwi.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/52650844395.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf12496bee---42609206915.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/275e98b2de5e907f6c3248d1c6e74131/tekuje.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/vepigilupubemebit.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/93059116768.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d062c3864b---6861566293.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16081278626be7---podoviwemalumo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a384bacee---bizamomapaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=resource+pack+hypixelPDF 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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 18476 bytes
SHA-256: 5e1531cbafacc00041cbd71e36026e8f9b99aa6c6e3772485c9bb4287386f7dc
font_01_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C21 10720 bytes
SHA-256: 7650ae81742a6566f1c5bca2762e2c80703834650d2a50e1a10c87bbe35aaee7