Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcccdc544dd5b8d…

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 13:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 621452c6d9d13c59a83ffc9acca5d272 SHA-1: 99e3bfc8f697ca788df767f8b033f5141818f13d SHA-256: 2fcccdc544dd5b8d01f7d340bd7db3fddebdbd9cd79a02638c52d0403507b9f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/0d38942bd385a82dad7dbee06ff18241/77122586694.pdf In PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-10/20210910193732147997.pdfIn PDF document text
    • http://greenglobepms.com/uploads/xetirotaw.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/manadogawupe.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/29891611509.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/98015783187.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109071352206839.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/32847519920.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/mapujirosamidetijo.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/38312636767.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ed9a7f291d57bc181506a517e795421e/ranufepovimupolunisati.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/33199870502.pdfIn PDF document text
    • https://rippa.pt/files/file/67615033495.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/82512802557.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210904/files/20210904023607.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b329a4965---78080633253.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/52567735817.pdfIn PDF document text
    • http://tannhatviet.vn/upload/files/paguwab.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/97992802051.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3q7u0mv7l9l1o1m83j67o4lsi9/80793185784.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/vabevotikezoji.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109100033194184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=heroes+rising+full+movie+dubPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bc25c04dd---pufolokeminamenimelix.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_off0000bf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74A 10732 bytes
SHA-256: abc0a61b6fdc28dc2fac2622955c7e5b0e060b2a1459adb66f4d487d2c18d36e
font_02_sfnt_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 18464 bytes
SHA-256: 919823e6fa2a640dc9afbf3f33c757f63ca5b6fd2e0a544c9a2c38e31b14b986