Malicious PDF — malware analysis report

Static analysis result for SHA-256 704d3b02b7555401…

MALICIOUS

PDF

78.6 KB Created: 2021-08-18 01:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f173d36946e0c4d592196f577125ed0b SHA-1: db0dfdd7ed44bf594eaf0c53468ce47d4df5a838 SHA-256: 704d3b02b75554013b4cb165707d10f25f5e81314eaf2e436b68f71ab8edd9a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the link farm structure is a common tactic for distributing malware or conducting phishing campaigns.

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://ketchas.ru/uplcv?utm_term=kannada+audio+video+songs+dj PDF link annotation
    • https://shopabrang.com/images/files/zokapetis.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/33746454461.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/foxopenulufifabapusib.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/d10904861621cca3b6197ebf7d2e6efd/tanikoxufefuf.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51166150062.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160852f4886ef8---71440355763.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0044fd7399---kufipitak.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2536e0037---fugeferazoloziporabuwavik.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/gilotogopaworabajesawox.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d937cb969c---50438289184.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2c1ddb2eddabb0b429194c700c354413/99134535635.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e912fa6aca---96341855602.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3a2846441b08e64adb1a53d8d0e7c9c5/gekase.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/95543780792.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/39938120036.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca16ccf1da---27111462182.pdfIn PDF document text
    • https://coatielectronica.com/files/bepuxivejuduke.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/15482430203.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/80217585473.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/96599320222.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/gonozawimumodejeto.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be5397f06f2---rivesobajan.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3eb679593ab6ce36167c432e1d68061e/dalaxarogegirobugurez.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/gekivo.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/89594516649.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_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 10468 bytes
SHA-256: 84250b1590d6b0b45206fb73fd5ba554d66cc4451be97088e913905084524c4a
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 16044 bytes
SHA-256: 7d01a197d1575e862cb51b2642011ace208902552882dac0ed3669f1b25f14b7

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