Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0c209a049d8e77…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 11:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 14e7b88f3b518503b0f4996af4232492 SHA-1: 357db9e140aad3d0220efee7b859883de6cfe22e SHA-256: 1e0c209a049d8e7789ac0290f3bcae332c2a684d1bcd7fe903293b24be85fb54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://homelife-superstars.com/image/files/zidiwona.pdf In PDF document text
    • http://hyundai-baoloc.com/luutru/files/pisedirimapolubovuwopapu.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/38269388516.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a631cc8fec0---15539810971.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/84290792743.pdfIn PDF document text
    • https://noddy.nu/images/file/96408741189.pdfIn PDF document text
    • https://unosms.us/userfiles/file/58481284719.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22dde9000ddfe0a838884c205a4f563d/59637489845.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/61388559273.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/88603939946.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f75c0308---furoxopimawomubiwewisid.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105393cb4476---tazowexugotexivebizudaxe.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f6bdc733b07cdacad10f9be1efff7590/38348683519.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f3a29263---muwewuneveziputoketokur.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c7a29a62f5---vafumozisolibeduwasoritam.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/31060819567.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/robedazosaluwasadizavakul.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/24835506501.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/dexum.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b04afaef4da---mokejesokopulotizebese.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/65351987973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=poodle+x+puppies+for+salePDF 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_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 17616 bytes
SHA-256: 72730bab16c2c66eeff13899b4bf4c74024d29e85c7847ca95acd3a4210e06dd
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 10492 bytes
SHA-256: 66281c73067e6b67723355cf77351f39177d14133e0d783230de4383d241343c
font_02_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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