Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc418da1342f1c05…

MALICIOUS

PDF

77.6 KB Created: 2021-09-10 02:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 900df10f9fb9749a813298735eecce45 SHA-1: 6613cb57069f1ed522f8a3314e2e8c85d4ac6f39 SHA-256: fc418da1342f1c05833aa5f3713ec5e33c0130a64a1e36937c947c5f1f5989c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=download+game+ppsspp+jet+li+rise+to+honor PDF link annotation
    • http://andrenickels.de/ckfinder/userfiles/files/milukaponosikorudebaguri.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/fevuxitoxazasofokus.pdfIn PDF document text
    • http://malifer.hu/upload/file/lotapuvubibo.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/13284491998.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139b53f74d67---35644772292.pdfIn PDF document text
    • http://perksys.com/userfiles/file/23158087603.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/gubuwimerun.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/64810790446.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613424fe915e0---76704751549.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/aad248547dc9706faf58d7c3dbec6d4f/gifokesizopo.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/bolurofudakowutukaru.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/teduxijapepejinez.pdfIn PDF document text
    • http://fgosvo.ru/files/files/29050021077.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6340fc97cd713790dfeb1f4075c137a8/kutuxiwivob.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/linosexonolowakuw.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/vuxipovidowofebudurisevaf.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613683e34438c---73355427876.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/49026704328.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613861ba036fb---guvawojenixixefukolol.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/fibugafatamapofesasapa.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/25640231009.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/silowisifofejamabon.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/6615798673.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98F 17584 bytes
SHA-256: e71279f96a0b07470ef0054439368e4b4d8aae8742a9b046abdbb5f58b0f6bb1
font_01_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 11056 bytes
SHA-256: 4e33a69d4ca5aaa80520b38dad1d47c47993969802cf51077ca3b45f5c7fb056
font_02_sfnt_off00011100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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