Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ebe82349166af0…

MALICIOUS

PDF

81.9 KB Created: 2021-07-04 11:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 031d615fccb9f3522148dd509b3e1f33 SHA-1: 4571d270886c09428409693aa586ec7d96bb9bb5 SHA-256: 29ebe82349166af0145b2e326f302f2bbdbdd29eb2395203b85dbb93afeeb9bc
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, many of which host other PDF files. This suggests a tactic to manipulate search engine results or distribute malicious content through a chain of compromised sites. The ML classifier strongly indicated maliciousness, and the presence of multiple links to compromised CMS uploads supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 5

  • 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://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086d1be9ee58---masorukapunomopoxa.pdf In PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2604b3eac63dc651240a59c8a3608354/79004066303.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0794ccc65f246221c2f408ae312b765c/20641018696.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/66383369219.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/1de45d6ccda0b243eb0c9b97c007abdb/mikotajosaxa.pdfIn PDF document text
    • https://tavio.ru/files/file/56334438446.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8925d287d22a7cda2c4b9dbc0315393c/damusubokenolejoparudu.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af53a7c22b---dixikugotanuwuti.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078403cce64a---siwojuronidelajipizulalif.pdfIn PDF document text
    • https://marosme.ro/hirek/file/pilizadinenenuvoloxekado.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/eh49b3l1mehl1bvrprsjclagvu/sejejotuwavidosinesozuz.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/1530692017.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0262231ffbd7ae615aefcd4e63d21436/17544359291.pdfIn PDF document text
    • https://x-software.cz/data/file/bubazonifufura.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8a4185b1f334dd4d0f546d630ee3c589/53364752322.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a3a896e6a642c89398aca5b3a08c40da/salawetogikakesap.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/togujajiram.pdfIn PDF document text
    • http://sdds.be/userfiles/file/momitokikijodonenonato.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/xegumabiwotubajojoxoroka.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/20152790895.pdfIn PDF document text
    • https://flyags.com/editorResources/file///vazerifujiku.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/t4v0pcju2vi5n0ph94ce4sbdn1/99234495214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mechanics+of+wave+forces+on+offshore+structuresPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 16936 bytes
SHA-256: d52475f0cc77f75021c823f7434bc0f8c7ae6f0944def4266721a37b132a586f
font_02_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 10632 bytes
SHA-256: 8b437536325295924adb4bbb9728b6778b95e5497039b265e1e9309011659e9a
font_03_sfnt_off00010547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10547 16756 bytes
SHA-256: bd1a31dc47ace3795227b62c6f12afc57a3bf387a53c067fafb7cbc7fbce7b27
font_04_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 1780 bytes
SHA-256: 95ce2b2c6bbc93a65c73b4e37c75259a0ef33b8643ea9972e37dd2c1d618c40b

Open this report in the interactive analyzer, or submit your own file for analysis.