Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd5a22b1357a03f…

MALICIOUS

PDF

97.5 KB Created: 2021-07-08 21:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 233858dcc8c951b0ae269f1c32cf7073 SHA-1: 89e92028890fc7abe8f795e9e24161813048824f SHA-256: bdd5a22b1357a03f3638fa3f9c7804e5135e5bc47064bed15b10621f675ae507
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript, though not fully analyzed due to obfuscation, is a common vector for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092d07aaffdb---kusatuf.pdf
    • https://fid-data.fr/app/webroot/uploaderfiles/10505164604.pdf
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/63777273980.pdf
    • https://barcelona-health.com/files/galeria/files/85092752901.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec97e53d7a---35853128787.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3a3e27570f6e59d63cb80efa36260220/57407828845.pdf
    • http://esistore.be/userfiles/file/33409696524.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc63b03aea---33728854315.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d97e17a1a---23777454315.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2dce82046---fojiwujepemiko.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa88e7d3de---fajajaborim.pdf
    • http://goteneplast.se/files/images/file/11567430417.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/95dd34bf1c5823aec148fd65cbd228c6/45218552619.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bb4f646a5---sasot.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609241302efd1---58001825257.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1fcdedb24ef9b34d48e85cfc1beddd3a/befokimoximupiposezaxo.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c3565c86c56be2d7e0b37f7be1b9e6eb/68309595147.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/bc5036d4175e50db82eb55423cd64a34/xalonexepaziwubef.pdf
    • https://hmanagement.net/userfiles/file/26700286485.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bad72249b---fikes.pdf
    • https://vegas-shop.net/uploads/files/21303381050.pdf
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/26517951822.pdf
    • https://majubesar.info/contents//files/46958988325.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=does+unsweetened+cocoa+have+caffeine
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011844.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 16792 bytes
font_01_sfnt_off00013056.bin
37c0b30fbfaf889bb552a3487313beab4ae0805815470d25326744e0e386c6b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13056 18076 bytes
font_02_sfnt_off00016057.bin
f17623d53c83336aa844b344acd8ffd2d4dd6102d9bd0b2cf0aecead1796a824
pdf-font-stream PDF embedded font (sfnt) at offset 0x16057 10680 bytes