Malicious PDF — malware analysis report

Static analysis result for SHA-256 3750cf488ac2f9c6…

MALICIOUS

PDF

90.8 KB Created: 2021-08-08 19:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2410e904883aa16a98a887335ecc888a SHA-1: c534572c2255b1e5cf9ba199ad8b167194d3072a SHA-256: 3750cf488ac2f9c6b944620377cfb1b3bd815b31ece28cb92e6e7d5c56c53c65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by masquerading as a useful document. No scripts were extracted, but the extensive use of external links points to a watering hole or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=timeline+template+google+docs+for+students PDF link annotation
    • http://jubileejec.com/userfiles/files/bomezedexoxikafi.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/62bfae313c122e509943b0d1c8612886/polozegomebejimisekim.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/45291436967.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/xakasegin.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/cd00cb361322a50d929c42328d3dad04/92877197980.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/47677481175.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82d13393a---buzejimabepetisub.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/jujigidamunirewoxoxemalus.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/zumasitakox.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210714040408.pdfIn PDF document text
    • http://waterreducer.cn/d/files/gizetilezavat.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/sobijobovadovabizubosoge.pdfIn PDF document text
    • https://gilbertems.com/videos/file/74656554203.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/35244968854.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210716162643803516.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/4suqup122negt8ske8dudelel6/vuvesuxop.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/q2h68k6roi0tcr94e2kd3jjqf2/34069559827.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/dufalut.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ea50ac83---zegokafazipufetujeja.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/kiredine.pdfIn PDF document text
    • https://lemanssrl.it/file/lidafatunimixorababorin.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b919af0fa27---lejeniseraniwipusi.pdfIn PDF document text
    • http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/bakisavumugukojevezupi.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_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F0 11024 bytes
SHA-256: a4e0448ab75b22ddda3e040866ac1d46a828943d79af38e6277763cf720adb64
font_02_sfnt_off00012f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F54 17080 bytes
SHA-256: 0c04b2e01049b751b5eccb3e3377dd149620b443dde098fda5244e6819a8a38a

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