Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fd4fd90e573daf…

MALICIOUS

PDF

64.0 KB Created: 2021-06-20 01:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f5a3e6e632dc5ba0ad3521ead0d9b3c5 SHA-1: cd25678584304676d3e616b61a700947d80f75fb SHA-256: 50fd4fd90e573daf3fe932f82d95521095d55f6326371f6bd9ec8887a50e6e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'counter terrorist sniper shoot mod apk', indicating a lure to download potentially malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://fitnessklub-impuls.pl/uploads/assets/file/27369959925.pdf In PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c61241a384---80129522451.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/67102584736.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9de97957---67349922523.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/rikosi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/tidazuboxef.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/82735111728.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/rijadegedit.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090329466092---73199974009.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/10831115052.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a5878273dd6---vularulisumezagotule.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80799da2b7---fokolase.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ec143024c200d186843261fe0a6b2352/84271029967.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/45323026387.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b82458cdec---letokuzolarezukeda.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/dowupoxeti.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/e5uresedsd71fc1k6eimfm8gu1/koramaxusojupimelus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=counter+terrorist+sniper+shoot+mod+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B6 5136 bytes
SHA-256: 4a04e8a18ccc81ef8c1af8ae2b717deb8d3fbea8be1ca82a11d462fc446a42ed
font_01_sfnt_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 10684 bytes
SHA-256: 9496e36ef54bc1469f73e715dff38627fb7a1d6e743014afac3ee88b68c8b7e0

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