Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ecf10ee0a276cd…

MALICIOUS

PDF

74.7 KB Created: 2021-10-09 02:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bafdd645619b0a45af38cffbfb4a04bd SHA-1: a1618ed447ddff9e428df6547483ba0095824a01 SHA-256: 47ecf10ee0a276cd1ea7c01e3a3c4a74e178c26f24a5163b5dbf991f6c69f73a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within the document body and appear to be part of a link farm designed to redirect users. Heuristics indicate these links are hosted on disposable or compromised domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=better+vision+without+glasses+pdf PDF link annotation
    • http://daming-school.com/userfiles/file/mamamuzup.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/54340709559.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/mijitidijibotenubarumo.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/72220708174.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/bopumapumekifatologif.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/84463389991.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/39383320507.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d50c8d292---tevaluxodideniseg.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/18735196178.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/tozeda.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/xadetawovovuvov.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/7d258861abddcc8f9b666f11a213a400/5192368270.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/36448937181.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/84294257244.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/47045390198.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae8adbc117---35060015754.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210930231454.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/15438878771.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bebuwekajifa.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/36388353447.pdfIn PDF document text
    • http://vinhosnorte.com/images/files/lofenazegojevaxaded.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/regixesenutu.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/vopilegoxomapebev.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1615405f44f1f2---revokese.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_off0000bd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD58 11084 bytes
SHA-256: a4276882312931bdc298837284734f7f528843fa376a6e136603a813118b3fa4
font_01_sfnt_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 17688 bytes
SHA-256: c69c86e992cfb44b33b4154b79ef63a1126cb36cfcfb2e1ee6ba78b9e8c710c0
font_02_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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