Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a250f4b1fa372a…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 22:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 34e0c48882a8ae99f7a977f9afa72451 SHA-1: 5e2ab3c0a0a2b2df0aaef52fb181f8eb9d1a9189 SHA-256: f6a250f4b1fa372acdaf2b27fd475d6cf3af68a4d6d01d5afa8a3a2e772aff0c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution vehicle. It functions as a link farm, presenting numerous URLs that lead to other PDF files hosted on compromised websites or disposable domains. The presence of multiple compromised CMS upload links and the overall structure suggest an attempt to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ihappywash.com/uploads/files/202109082050592641.pdf In PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/30013229554.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/oo2np3mkf51mstu7shmtr1ubsd/41182979280.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133845430946---jifitusefixopafozu.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/96970102031.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/81597400761.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/xuwavujufaduk.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/javivebiguraruvilaputex.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/4775619262.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109081550268077.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/kurovevujodokegakotal.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/95487898613.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/38666293959.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/bububuka.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/7725235893.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/zavazole.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613298fbb1e6f.pdfIn PDF document text
    • http://getdol.com/page_data/file/tefavix.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/pureza.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/29829576710.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/xipajub.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/wunabalarudubitunoxuxap.pdfIn PDF document text
    • https://mimpidia.com/contents/files/kokigexafavos.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/jazebomafekukevudoj.pdfIn PDF document text
    • http://1careglobal.com/upload/files/jagisuroguxovekabujogu.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/babevuxuselosojolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=run+hide+fight+full+movie+123PDF 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_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 10924 bytes
SHA-256: 790a23e4fea451c688f57a2e3b3303945722e15170dcbe9fef6cfcbd7eba9a7c
font_01_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 20432 bytes
SHA-256: 6ac74ad5119e9479fb5d20a1c1ed53ea4eb1acfc33c01d2850783fdee1b82a89
font_02_sfnt_off000123ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.