Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eb26dc81ce98e1…

MALICIOUS

PDF

76.5 KB Created: 2021-09-04 20:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 956b67bff5854113e5468c60e84a29b8 SHA-1: 319493bf49bb24724ab687e6fdee10183f3923c0 SHA-256: 05eb26dc81ce98e11b8987ead28e3af5a181e8f4e184e5645aaed4d42e718b6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS uploads or disposable domains. This pattern is indicative of phishing or malware distribution, aiming to lure users to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/7l2ngujd8qlp1aj12rp9ot7p2l/jafomatodatibanomukotexot.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e2c93ad7cd7dad3d39a6e49a29bb6bc6/1932296873.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f023a24d083---32944103758.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/kojorune.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/pipekagubijemogotu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/o8bmortk88h3ivd2hgt5thda9l/nixovopevudolozurokavelo.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/b840b53fc39904b480cef907eca5ca09/86348574174.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6916f42db4---5966923303.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed6a1e518f0---widatov.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/kqrvkvlhrgps6k9hr847hl9ptr/66665843061.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092041ed316c---wexebuwetemiwog.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/fb72a91e26db13bdbe88d04c5f671e04/26177440878.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/kl33vab1ldql57ovp06kjl1ht1/burifewubinovedetofelisig.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/16419601866.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/73076358116.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210730185119.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/18959949838.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/mezoxezoditu.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/wagosopami.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/68261138298.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/86343287792.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/34150258154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=foods+to+eat+to+lower+cholesterol+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_off0000ca05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA05 16464 bytes
SHA-256: 4c792c7d7dcd50b31ac52de52f9087aed7732fc6059f03513449967c10bccb5e
font_01_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 10584 bytes
SHA-256: bd27a872917ea5e5cfb84c0b793935a13f2a30ee9ee14cc6bf7d3217e00f2a6b
font_02_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1