Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb20d4d3d89484c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 23:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: da6c9e74228bc01a3f1f0cca0b13dcf1 SHA-1: 1c09f02e5611c39524a6feaaa479d86ea0721f3a SHA-256: 7eb20d4d3d89484c114ec951121deeff73b441d13217c1620a001e42f258fd41
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://asset-books.com/userfiles/file/tagelix.pdf In PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/xiselajalalipazig.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f890892dd---jelitexelaguzujiribikokar.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/bosobinusojizixol.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160941403690eb---27187072487.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ce9a3f48b2b4cf613cdfc420b670910e/42640944170.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/d88806930bd3a369eb3bfd89dd162ae5/46764239499.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/fubutopanawafitekukes.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/wojipojux.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fc0de7be---kopedulikabaxolitonoj.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/65301368972.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/79174683949.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/xovuloji.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab54430ebf---89684851478.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608043478b989---wetodefevuvokubitafudena.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/e363bce7428cba83e491a994be3e6a76/goraxusu.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/f23cb67d28cfc436308bea48ec833cf1/41014350514.pdfIn PDF document text
    • http://elitvorota.ru/f/file/56232338932.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/lupilofuxikafidojadiwebus.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/25161231692.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/vegutelotiz.pdfIn PDF document text
    • http://fructusartis.com/i/File/82258945493.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/69149748712.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/baesncf3jjd3c6psro5pj4e4uh/69810464131.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=manual+gritting+machinesPDF 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_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 10652 bytes
SHA-256: 1ad76e619b3c610cdeeb1d1cde39a4db22ea6ae4c9a159e159af5305d5ca6cf4
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 17440 bytes
SHA-256: 53825d8066c7aaad74926d4c9ec787ffb02ae4100387e4bf99f2ea6e32966873

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