Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd9ad81aba62772…

MALICIOUS

PDF

76.4 KB Created: 2021-09-08 03:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 677d5a64c2bde8aeb8637f9e851b1b88 SHA-1: a2f213ab3f98acfdf568f1f68672affbdcdc121b SHA-256: ddd9ad81aba627721464c6152c41e15dee8a3a1f7f3653c6307193ea015b2ad2
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt. The presence of embedded JavaScript suggests potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zorovi.pdf In PDF document text
    • http://garageanything.com/js/upload/files/45976634877.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/keliruxupip.pdfIn PDF document text
    • https://chptravel.ir/data/file/serikunagekogivivanojus.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6d1f13da3b2de032c3bd5dddfc055b89/dogaxibavikixu.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160746760c97ca---vidererodijowoderub.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096721794025---44474966067.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///dotugix.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/40484984606.pdfIn PDF document text
    • http://flirdining.com/uploads/files/zafomafolebedade.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/74522402130.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/j3mvqd0d04mkcr6co6qoeum7c2/zimupowenitabusowij.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/45185375179.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/regafilex.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/91679874284.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/3ohk3a2f84q3v7m8vkhs56ni64/mujezizesugimewuf.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160825b26b1b58---senupetobefuwexo.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/zofulotoxo.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109031650375850.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9dc249668---makidolibe.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/96668202127.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/46279835928.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/47585294506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=basic+electrical+troubleshooting+techniques+pdfPDF 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_off0000c6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D0 16680 bytes
SHA-256: 323ea3651b5795bda37dfb4b7c614d73678b8631106daf3e6307c7f43a0c5682
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 11336 bytes
SHA-256: 9cf582cc2316ac1f7e0130b3b98e8f55c763069a77de7267760cca820d5101f3

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