Malicious PDF — malware analysis report

Static analysis result for SHA-256 89714409aeabd147…

MALICIOUS

PDF

85.8 KB Created: 2021-07-02 10:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faa18802afc28b0fa7db4ec02c42ef96 SHA-1: 0c2a7fe996b6185963659126d9912efec7bddc64 SHA-256: 89714409aeabd1472db98a7f906ca38405d277543450611ee9b4e0b4a5d611e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or redirection scheme. The document body is heavily obfuscated and unreadable, but the presence of numerous external links and the heuristic firings strongly indicate a phishing or malicious redirection attempt.

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 http://beastyenergy.com/userfiles/file/zonid.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/pifivetol.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7a1c276e---gogapis.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/taliwasumegelitonat.pdf
    • http://anatolianlgs.com/userfiles/file/95548956698.pdf
    • http://jncs.kr/page_data/file/20210525083339.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607ed2074efa4---10917957666.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160996dff73768---mamotovulug.pdf
    • http://aquatherm-graz.at/files/58204782014.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/xexinovufesujogidenexudi.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320c7a2bcb---9072705171.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa6b6106c---pulubafuv.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/25746541384.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e511887596---renukab.pdf
    • http://dancedynamicsla.com/clients/38740/File/96232228199.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e8ad124dd5e32d280f3609edcd0424cf/4386125825.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6835cb1688---dasetu.pdf
    • http://franzoesischebulldoggen.eu/userfiles/file/zafon.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f244d37df98a6f13dca292fd05159846/77891651028.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab214c5c2a8---70837681342.pdf
    • http://soft-pro.hr/upload/datoteke/vozakix.pdf
    • http://tecresconsolidamentorestauro.it/fck_data/file/1784559267.pdf
    • https://ajur.rest/uploads/userfiles/file/redijuve.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608718fa6bf8c---kiraze.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=taunting+destiny+read+online+free
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/72dc93765af93ceb1bc7fae1e88a936f/5476024857.pdf
    • 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_off0000ea24.bin
593e399a33199e80bdc2ab763060b2510b0d43e11d6c7c559b7368b8f5ff78b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 10704 bytes
font_01_sfnt_off000102ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 16792 bytes
font_02_sfnt_off00011abf.bin
22a9d59c73066370524106e3546d510b1d0061256372a3babd4f4890881132b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 17784 bytes