Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bd8062e2ac0240…

MALICIOUS

PDF

80.6 KB Created: 2021-07-14 04:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ce0e9d4304134c7b557ba158de048fbd SHA-1: 720050e39ed426fdd5f5c242caeb53c529e8b82c SHA-256: 46bd8062e2ac02408cc44a6b1802c4926cae46ec7f2621063581e09fb4fb6271
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used as a lure, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://cructi.ru/uplcv?utm_term=retaining+wall+design+calculations+excel PDF link annotation
    • http://flomojapan.com/upload/files/bonos.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/69391665693.pdfIn PDF document text
    • http://bronia.org/userfiles/file/buvakirix.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fcd9ce8b4---61184446281.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/xuwegutukovugamosevinoki.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607404a625f6a---gakaxogesuvutixikajeliziv.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/03e0aaf8b7e118420f2110126b9f3d83/kedidilipobetamom.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/wogine.pdfIn PDF document text
    • https://baongochoa.com/upload/file/rexobiwapufunoxewelitij.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///buzanaxabojugexixosuvuxik.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f7677bd50dd6793b9dccde280b708262/lurinekobodi.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/frv4dt50rel1nu2lc4s7n56b9u/femuniponirox.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/866f53ac4ab514bf1b94a12096f2b7e0/bulozibokotijamodogop.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/982f77c8ec3b3c071c17d6a9be62ee12/zimomifuxanidima.pdfIn PDF document text
    • http://ministerium.pt/files/bojoxafovuwavegufubero.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160738c6bb0fa1---73117919508.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/wolofom.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/eb51357820e8aa8edd6e7a363a1c2428/wularitilutakaxulubus.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/a06f631f4a64272712ae25a2d974c3b5/kusizikotozufazujesukat.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/xolenusas.pdfIn PDF document text
    • http://www.moyekolodin.com/files/5322038144.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/er6vaf6dpniuq9h3gnieqd26a6/xetesijaxejagipejuwakofij.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/turusulexoti.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/28258662068.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/tutajufuwefamotodos.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_off0000d9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 10776 bytes
SHA-256: 0f16eca328dc2e1cbbfd64901125b817b8e67db006fb6247a2398cd53f25196d
font_02_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 16236 bytes
SHA-256: 83d40235c2772bd155d375c0a8a3b631b18fc0bd284a2edd4f0e9693c5fc6965

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