Malicious PDF — malware analysis report

Static analysis result for SHA-256 68be0a75547bec5d…

MALICIOUS

PDF

80.0 KB Created: 2021-07-25 18:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 263cdd85d02da98710c8e0e0a8742c26 SHA-1: 8c49f0300c5a980a506aa1c74f6ef015b455b03c SHA-256: 68be0a75547bec5d0e0fc5681137ca45eddaa41d56216814f26c15dcb494f85a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the overall structure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1cmda04g69aldlaqm18clsine/witux.pdf In PDF document text
    • http://omegapizza.net/uploads/files/36902752541.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/98024864898.pdfIn macro / runtime command snippet
    • http://ebsenglish.net/_UploadFile/Images/file/61535001388.pdfIn macro / runtime command snippet
    • http://www.biotanika.pl/upload/file/46860332803.pdfIn PDF document text
    • http://prota.ru/upload/files/kebidezezerosipiwa.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/zefoto.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a822df19932---nexajapawumajadalisa.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/20167155915.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/52895116256.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/devitod.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0f6d6fae---57579954848.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/eaprah9m1fojogsoscqbl090vc/zamijaxanopugu.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/xizapadujavawefijagagusa.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160873fb3026b2---mevubawar.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/zubewa.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/fopuxunigobeloxetawitor.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/kufimuziwikolibifiteka.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/u6383phf49tkd3uutk55a2u6bb/sizokeliludajo.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/af779a266d189740eabc504c4acb8f90/98038353460.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/suvewusulutepudateno.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/rulubujuwawuloxezutoxopu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d860dbd9b2---wadafuwemegazorotuwir.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606da61c7a366---mejujofixipo.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/6552965391.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/85451838129.pdfIn PDF document text
    • http://omegapizza.net/uplIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=all+rainbow+six+siege+ranked+charmsPDF 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_off0000d59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 11120 bytes
SHA-256: 9301a97b8f4cd8ee71f227e4b762933073dffe9c6939d1f6dc24b10c3fc99518
font_02_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 16300 bytes
SHA-256: 5aa12a30d0e8c4fc35e283d62f1c0befc5711c8ca75d9ec20487e3e69caa0c6b

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