Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3d95d05a2d54a3…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 07:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbf99a4e967c02714e47d45d3e18c8ff SHA-1: 4ff5694a119f224e1917efff8f089397f88d3398 SHA-256: fa3d95d05a2d54a3d4abe253a18e41673071c2f740b74fb9c9e6fb8d91a48282
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://store-connector.com/_upload_bilder/_filemanager/file/25720346189.pdf
    • https://bursac.net/userfiles/file/rinipimufimafedozu.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5930b6225---75672746024.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca30ade8450---35673423407.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c99af6b409---xawekude.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082426b8c7b6---63267310661.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c382d613e13---madado.pdf
    • http://nhatrangpalace.vn/app/webroot/upload/files/65574145463.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a4147d2e752---52000028834.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fd43971a2---vusebosasiv.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/87388086273.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddfdaade2---togebebufa.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/a4b4ogqje7f77gf64vg2dls5e5/93981763218.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3f258763---38889028901.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0c8557d331dc6121519e5cd4567b041f/vewewemozo.pdf
    • https://annjulieskarpmo.com/userfiles/file/92511989772.pdf
    • http://infrabud.eu/fckpliki/file/10358390464.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7eae9e2b5---49120441126.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4bu244bb3ftid3ps14olk9csjn/golufojekunasosegoroka.pdf
    • http://rollfactorytogo.com/uploads/files/pumuginafijaxokube.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075e354bea8d---70890512426.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/2e77671983a2e2a2cacfed9249b80f08/83179351643.pdf
    • http://highendschmiede.de/highendfiles/file/61683939313.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=phrases+to+motivate+students+to+learn+english
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 16792 bytes
font_01_sfnt_off000110cb.bin
c9b1b704cecb3e61dca2f120d930bd559e7bc3b22a31588439ef817ced12c4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 10864 bytes
font_02_sfnt_off00012980.bin
e7671ed6fec34eab0cd8a2dade78cd8ebbc5d36b137de8b3407c45e95a343ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12980 16728 bytes

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