Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee65319f0bc1b4b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 01:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c38b5c76e218c645641da169e405c114 SHA-1: e4ee763705324015100c553597851d189cea9489 SHA-256: dee65319f0bc1b4bd777eb1a113d0467965135db921a0e1a859cfba84ee30460
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple URLs hosted on compromised CMS upload storage and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to malicious sites.

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://alkanboya.com/files/file///22300841530.pdf In PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/kutumawamamonigemifome.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/74613618804.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a23cc2c65---59993075661.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/36273584804.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/lugamuguwamov.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/xudodurodubaso.pdfIn PDF document text
    • http://forti.in/userfiles/file/98556653963.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c5374c17f3184816da5f4bd9c0485954/36372110417.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fda4e7c59c---potiwitoxisasumexivukaz.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/71635966780.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/37073895347.pdfIn PDF document text
    • https://noddy.nu/images/file/motanapudosilalododexu.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/simegeje.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/sozixuwejorobel.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c384d3771e4---43725226813.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945aa09def3---77817046724.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/wadud.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/63929106151.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/c174bnrl4u6e5ujgqroo8is3mv/12373026144.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/parasavatirobaximisixo.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/17294623210.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/gejinudumugatotenot.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/10906701430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=strike+force+mod+pack+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 18852 bytes
SHA-256: 61b8bd5385db8547d9c3f68c481bec21e8e9ecc05553d486616a19be63bffb7d
font_01_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 10880 bytes
SHA-256: 9edd1b14ca4da760fe93aa499bb4649c70c9bf7907fb6f680c66080901411405
font_02_sfnt_off00012663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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