Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d7575199d29ab4…

MALICIOUS

PDF

71.4 KB Created: 2021-09-30 10:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0bafd27e49eb6741c787499455a23b1e SHA-1: 9a30926b25275a4ff755a5ccd19be285605b27bf SHA-256: 90d7575199d29ab4a59914b56c29637c68d2e442be761ac0cf7a6d7bb55dd90d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the true destination. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the interpretation of this file as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=adult+sex+games+download+apk PDF link annotation
    • http://poddertradingandindustries.com/userfiles/file/dizafadowaxig.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/46325507173.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/47998906550.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/wofizifax.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4a36cac3---zejepaw.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/17171509174.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210923000342.pdfIn PDF document text
    • http://rld-carbon.ru/file/56971888909.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/xanaxefusitulijudav.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/86006784787.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/u9da66d1i8hck97gctmjamufd9/67485106953.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/6609545681.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/jitokekexodu.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/pefozunebigemen.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/kuluvaxogefuloze.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/3027785783.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9ad0549f45f3aab2c8b6135861f0945f/putewuxured.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/51195485785.pdfIn PDF document text
    • https://camelcarpet.org/d/files/91114316985.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/potazifa.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/femopuzogowafigusojejavo.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/12362594222.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161398ced0547a---pemalerekeberenigexog.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/tuxivasofadebuboruso.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_off0000b3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 16732 bytes
SHA-256: 5fee25dfc2c119ffa55dd745c2f442862d8e03d532a7852553ed1ce090e384bc
font_01_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 10904 bytes
SHA-256: d6db186cb89714fe36c829d5690acd54071674879546757de2894fac90f8e88e
font_02_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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