Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8b499677cdc71a…

MALICIOUS

PDF

82.6 KB Created: 2021-06-26 22:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 395e4163ee8a692471f419e34292e0c8 SHA-1: 37eb0edb637c879032736eabd9fe3b4438815883 SHA-256: 2d8b499677cdc71a5ee15c624b91c2eb1c6ae16e5bea46cd2cba069240628b2c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters suggests a focus on user engagement or tracking for malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://queure.ru/uplcv?utm_term=buy+worming+tablets
    • http://am-assets.com/aom/magnolia/userfiles/file/vimumu.pdf
    • http://brainbond.ro/userfiles/file/pasufenabugek.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/61pgqhdut5jobdjoevkkq20g65/boseka.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745d4b1c8fa---vikamekosul.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf4ee4124---5189813821.pdf
    • http://www.niziointerior.pl/upload/file/24207122127.pdf
    • http://xn--aknmedikal-yub.com/uploads/file/xukaxutu.pdf
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/026a421331dd8fc356e8e8b0ea4b5f3d/30472038413.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f558d045d---75486040017.pdf
    • http://asavn.vn/uploads/userfiles/files/96526318326.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8297ec037---28786463447.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acbecce96a2---runubovuzemowivokepowazit.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a80150bfa8---xuxelipesuwoleboted.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4859acaeb---50678767448.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2f0c81236fe4d7fdd879060e64308d54/dowerakebavidekewi.pdf
    • https://haltia.mx/sii/ckfinder/userfiles/files/xofufidore.pdf
    • 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_off0000df8f.bin
1095e829bf6fb856a8382f41aea50ca247e919f923294606bbbb1ba82a4d188e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 17304 bytes
font_01_sfnt_off00010c3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 16792 bytes
font_02_sfnt_off00012452.bin
acce4a3a2af4a0b2aec610acccb7fce49648c6cf77071e423f6b12c2cec97d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 10944 bytes

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