Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1eabab64c6e1b5a…

MALICIOUS

PDF

90.7 KB Created: 2021-09-01 22:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a7acfd62039da09c08a5b35d3e3c2b3 SHA-1: ffda9a155a12767014897f1ad19f9d79dbc788bb SHA-256: e1eabab64c6e1b5a651be67cd9a4b0481c2ff8fd926ef7e35fef7248a3ec8485
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://laborke.ru/uplcv?utm_term=career+paths+for+defender+personality+type PDF link annotation
    • https://ambient-interier.cz/files/files/41873368873.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2e409d4a5206ada89ba1334872cb56a5/52630247264.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076344199f07---2212082448.pdfIn PDF document text
    • http://zuche0551.com/upload/file/vofijujosuvuxef.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129fc2f9e899---moxutekolaruxa.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/56308622138.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b8bd33737---73619002724.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/nagikepeje.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/damorowo.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v2cc5tjuaem4gsamd9k3t110e1/50691351169.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9504f213db494d7860d402e626f1687e/93403699367.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba389d127be---sigexutivelewajarivazib.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/46230631580.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/61p6rpt4m9lb9so78bv1is7771/9177056013.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/guvuzuvube.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb0de9599---vodaliwusesogit.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/190157767.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/ce33ca140415cd2eba68373b61e1aa4d/mowowinalataw.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4ceb54ade---kiwodu.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/ropew.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e343ac62---jenamalamebovapez.pdfIn PDF document text
    • http://darec.sk/files/files/zepozoragurilesadasudosu.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/12728616201.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/tosixowa.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_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 18892 bytes
SHA-256: bbd911f607122f2c5787a333a81a72e700e620e5976b9bc45c9a6a9ef135ba04
font_02_sfnt_off00014373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 10740 bytes
SHA-256: d410c3f3f41f23b67a93afb8fda77232d0ed4b76bb839b20f1163fabd7b8f9e8

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