Malicious PDF — malware analysis report

Static analysis result for SHA-256 20537ee989e07122…

MALICIOUS

PDF

91.1 KB Created: 2021-09-07 17:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f152802592cf6f0b514853b11190abb3 SHA-1: 489d0c7d7c7f03189da0c6535d4016a45990ccfc SHA-256: 20537ee989e0712245f1bc3d76e484b5a7be8bc7662c4db8cc8af0471de2139c
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://queure.ru/uplcv?utm_term=shimadzu+prominence+hplc+user+manual PDF link annotation
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b21b1da12f4---baxobuse.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/gonedapavudukofomopag.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/6217091693.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91bb626e2e---93762571428.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/63785838479.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab60b79986a---nogapupojivezobeneperep.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3a69b4459c330a6ca5ea0a8f4b797577/jadonisi.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/3698287329.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/41460226456.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/69271070453.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/7a02c573ff20ecc72c974ebbce5857b2/wonelilaxubuzabanibogexo.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/dugijiguzanasirodexid.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/27745996733.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/fofipalijoxarolizuvebadi.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/94882819909.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/61638017683.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/motana.pdfIn PDF document text
    • http://riversedgefm.com/files/file/kovazo.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/a3mpftvkuuq2qluvb52n8lug7b/32479152631.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd1d79151d---83128099640.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/tinene.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/85861271099.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/53251775381.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_off0000fe7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 10916 bytes
SHA-256: ba221ea1616240ffc5531e187a3f162ea360a39093d37a12f71a3985d8a8f3ac
font_02_sfnt_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 17900 bytes
SHA-256: 47f17d68ce24ec45e12ca0825d0560f23c01a83689411c1bbf91261a88002285

Open this report in the interactive analyzer, or submit your own file for analysis.