Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27467b0d6a9dcf8…

MALICIOUS

PDF

84.5 KB Created: 2021-08-07 01:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9a0485b477ce026bd0485da127d42da7 SHA-1: 9f04e1407661c662e791ac84d56fb5c9b9161b4c SHA-256: d27467b0d6a9dcf8248687bae50a658ca327c8cb1991c9b6be765699b25ee02b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous links to PDF files on potentially compromised domains points to a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fototipia.hu/files/files/16757455179.pdf In PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c25e6d1f694729bd0878af8cf019cd70/soburewamevixotaviw.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/wovoferiduwogawibe.pdfIn PDF document text
    • http://ipllaser.in/uploads/959076819.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/99289164187.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/bagepasipimi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6q7v2d23ej44fnmufu27c2js23/15954680173.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210718_21A228DB8CBA57A8.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/soditufowodidofun.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/22721951383.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/9vlhqhmdi0558o5mgpltbe02f4/vonazonosi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jg612d0dchottoai6q3p70e4t6/bexulomasesefazimuzex.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ba16e7a9e1c---95686224957.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a82c16b3bfc---83910870899.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/23139482303.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/32ac32a0255a88a7edb76285e0e25335/33411312479.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/30904365737.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/c5a59e4b7454ce9d0703657577e9bdf5/37125796579.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/68265856962.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/zubilejolomumi.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/kuzebuwunumik.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c0cf859c677156bc1b307c478e5253a6/18142217732.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/80222995242.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/rifinerazudig.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/753f688f883a9831f946ccc4d60193fc/tejabojokaniwiwofofukave.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/zefasivajukumag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gunship+3+us+navy+full+apk+free+downloadPDF 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_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 17532 bytes
SHA-256: 7c2fcc054c3b608f0545babc18570e4cc7c785a7a6f34a89f1e100aa5e59ab1c
font_02_sfnt_off000128dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 11164 bytes
SHA-256: 2ec19f69ac82d2b9999f5fe24132e5f7a7f0b9a64d4fa94032796ff75c9980e0

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