Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaacbe65638aebf9…

MALICIOUS

PDF

132.2 KB Created: 2021-06-27 06:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23b3306004781051dba97081324a0dd0 SHA-1: fd1fa7281b781ce544c345f301e14161ddcb1afa SHA-256: eaacbe65638aebf9fa8294fc3dd129b087f4bb8bd2512b41c5ad94bf3c765407
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The embedded URLs are likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/765q6l4d3mu2bhj0ot36ifhv0e/64016734120.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5ec4f35aa---rosajo.pdf
    • http://kiiga.ru/userfiles/file/nawijepejikel.pdf
    • https://nbtele.com/en/cache/fck_files/file/mosegukutanewijekukafi.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ce84f6236d268edb2b295c565d0c2e8e/26612028804.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2f6deecdfd9e09f33d225789ae13ed8/51467475296.pdf
    • http://shopcloud.cloud//ckfinder/userfiles/files/mizuwifikubasixes.pdf
    • http://m2m2design.com/userfiles/nonuvoloxaxavazap.pdf
    • http://pospatrans.cz/UserFiles/File/8517331046.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ec01c834---barozotibidize.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7dfb5152f8ee69d81e45f437b751ba65/jobosopisajubefigapazite.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b09994231d---zemora.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/aff12a1538c84d87217f35dd466c0f98/nuxowawijumoxaxusolaz.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf87bd23a1---soteruvipenisorute.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ed10c294a---96347186309.pdf
    • http://karat-dobremiasto.pl/userfiles/file/38318267772.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/l378defhg778t7rfqikeutabpa/5833997971.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508266e7f7---12064559755.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb484cd6bd4---kowamiroxetixijukes.pdf
    • http://bodegaadrover.com/userfiles//imagenes/nubez.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ce63088dc33---pojope.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97ed26aa505a29eda7170ee091832368/vefabesigujilifupakukurat.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a766d2de29aa71a90d523162c2f746d5/66606800580.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0aba52f6b---muzojinovilefe.pdf
    • https://accuratesearch.com/userfiles/file/fomezi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=scarce+water+meaning
    • 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_off0001a563.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A563 16792 bytes
font_01_sfnt_off0001bd7a.bin
3bbab6b797c83403cd74b82cf9ebbfa9959dff802faa50932e49fdca295a6064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD7A 10400 bytes
font_02_sfnt_off0001d511.bin
0d42c6ba176d3a45f2a53914f768f6fcbc3841880c11cbe9ee651873bc5dda13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D511 17888 bytes

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