Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff014d1e27e3514…

MALICIOUS

PDF

85.1 KB Created: 2021-09-13 10:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 97b2cbd9b9f02a4eb9b2654c183f5e13 SHA-1: 48e791e0545cb6103e2f077d848e83932c409c46 SHA-256: 7ff014d1e27e3514b8f46714b00a497284fc8f1e5d919c4d8c0bfcc711258882
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, indicating an attempt to redirect users to malicious content. The presence of external URIs and link farms suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://angelsstaff.com/uploads/file/33084487671.pdf In PDF document text
    • https://specialgarden.ro/userfiles/file/89226134599.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109101112072427.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/56651049470.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e39a2569e4---61547334412.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1631284408_1.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/nezedefadatunibojo.pdfIn PDF document text
    • http://zamgph.com/uploads/file/020955486464.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/jigubo.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/jekosez.pdfIn PDF document text
    • http://yibetter.com/data/files/5888214103.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/nawobopesusobopep.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/44695208409.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/69269354157.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c9f969b1702163e55d2f7a914a226167/48477965061.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/zudasalaxibumero.pdfIn PDF document text
    • http://moretonassets.net/userfiles/67130682680.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/wefadibajabixevixujomobu.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/biremilisarusi.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/konefoxafewevijozi.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/xakibu.pdfIn PDF document text
    • http://szpk.hu/_user/file/38890476771.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e612266b6b---segixebi.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/musixoni.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/neloxatowakusulisibosoduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+receive+text+messages+on+ipad+from+android+phonePDF 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_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 18372 bytes
SHA-256: 866668eab18e8ad596f058209e40a0537e65bda2ef14fc0a7a10db33612e2562
font_01_sfnt_off000113da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DA 11264 bytes
SHA-256: 50769d196397f203be96601b822ed2c44088dce3d8ee8234e7ede6c13eec153c
font_02_sfnt_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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