Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f560995dac31d5…

MALICIOUS

PDF

75.5 KB Created: 2021-09-19 04:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2ff9602a330a9ecbbb78fc2ba989c6d2 SHA-1: 1475a90e0a5a3411f59f73aa61a7913325e5e56f SHA-256: 30f560995dac31d587ef371ea4776dbf86675d858d2f52974a9f49174a2c6af0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of external URI heuristics and link farm indicators points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/rolukefefewu.pdf In PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/duwuritalize.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/46211504874.pdfIn PDF document text
    • http://mrybalko.ru/files/65789901626.pdfIn PDF document text
    • https://shunnasato.com/pumuxepaxokasewo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401eb2009de---51540994503.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/sipibesifom.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/bubedejogasanazuve.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614482073a56e---gikemul.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/fukowiraj.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/tuxofof.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130215e8a72f---ladawefemedifezavuw.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/mowoturekel.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/348882392613de0f5ec58c.pdfIn PDF document text
    • https://heureka-cz.eu/files/wepawurix.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/zagamilibexovuworif.pdfIn PDF document text
    • https://blugarden.eu/file/julisa.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/pusabebojutojedukepalu.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/figorikeguzatu.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/dibujeronutepugiwi.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zonoreviguranozurev.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/nukitivilanubuzunidus.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/21501018778.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/b52a1eackuhoc9n4npe2pc3e15/ruxujizukipakexolafarobi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161386d88ecaeb---gigonijev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=principles+of+physics+solutionsPDF 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_off0000c472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC472 17020 bytes
SHA-256: 135389ef41685d5d7c2ad22df975ac601c8db901385119f70cfde04f179c38b4
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10851 10628 bytes
SHA-256: a0d717bc4794bd6556ecf8d05039ae0aaa5979236c5d09ca6b68fe9e9c1612b3

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