Malicious PDF — malware analysis report

Static analysis result for SHA-256 6242d5688e249ef7…

MALICIOUS

PDF

85.1 KB Created: 2021-08-11 20:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-29
MD5: 5906d391eaf7f38b63373293471676fe SHA-1: e10f10209a998f18213e9bf171b8246f274e21ae SHA-256: 6242d5688e249ef75504300343d269c544c58667a72aab1baf719a3063b776e8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to compromised websites or known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the structure and embedded URLs suggest the document's primary function is to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=carrom+disc+pool+hack+apk In PDF document text
    • http://tccsrl.org/userfiles/files/xajixutesejowunuvosixufil.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/mawidaxuku.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/21318221996.pdfIn PDF document text
    • http://midel.me/userfiles/file/58052176714.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/39783166849.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/zuzitelaremufovixuvov.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608528d74269e---73378367089.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/77395556022.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dfa15c763---86214377732.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/67857775320.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/ce5feaeb1f94c0927a26c53c634c6d1d/bufujitisalorixatewo.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bb8850ef1c8442438fff554b1e4c45f1/duduzupurepageda.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/3f73a619461a6b6fe0e88c8b5e511e75/lupojinurajedoxewa.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/74fc808c8f7c275f3ba74632f154f266/73138375664.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b70c84d5f---91619296132.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/32140923466.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/rikudodawufav.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/pojelabujelanibugamap.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607a632dda376---77197535477.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/92dd6720f3050f1d50e418a278c9eff0/66181960412.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/giteve.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16079dfec860ea---7517281704.pdfIn PDF document text
    • https://everestart.com/images/stories/file/57182788718.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_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 10568 bytes
SHA-256: dc09dfa2ed1bd9cc9230373bd1b7bdca3163091b536dd055c2b4af6dd995e5d6
font_02_sfnt_off000119f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F1 16600 bytes
SHA-256: b5de69d387bc906048448eed4084bd61e1c09551c8682f41bd679e7002b963c6