Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d0a827686c7892…

MALICIOUS

PDF

115.7 KB Created: 2021-07-02 08:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 20470cd7832d5cd90dbe9e8d49bb6f7b SHA-1: dd4f1e0035182c60b6c17ab9265d8c4f6d04e915 SHA-256: 67d0a827686c789232a62e0ffff462e6a3b552190b60127e202b54700764e936
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://suamayin.biz/userfiles/file/gamilugedabejakuximopuwa.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079f3cde2109---74020225240.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859683983ec---43680840961.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/59830026851.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/l634h2cfeolfa1stta7md7n6j8/12197760535.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/zowabopalat.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f1443c7a8cb1f8b110a8f3fee714ff4e/70467327467.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68a4ca5858---56745269919.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/bezux.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/54289472271.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608730935206c---14295106604.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2a02c75a0e6fc03f3160007a95bd2c92/dewuralipezi.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d318c39509b---rufimik.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/623c8b210ef49f825f11ba6e3c7cb9fb/rujafakuxaraxegavu.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/b44d0c9c341780ef0204ac38622b2d40/21603094651.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pawepowon.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/84720615222.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8e69e428---5464715648.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/68916520843.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5hbes4rcaeg15govjal793qra4/nipofaponizelomaku.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086239622192---juvenuzoxe.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/27209303747.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606f920062f7c---53286586257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ds3+golden+wing+crest+shieldPDF 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_off00015f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F03 19144 bytes
SHA-256: 91349f53f0c5484c70c30a6eee6fe9dc9dad3ee8701400b79fda356ba65438d2
font_01_sfnt_off0001912b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1912B 10744 bytes
SHA-256: 1f88a8694e86ccc759680a0b8323c85408ad1307be51f075ff18c05427d612a6
font_02_sfnt_off0001a9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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