Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb972aa6cde20176…

MALICIOUS

PDF

106.6 KB Created: 2021-06-25 20:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd428fd497427df676e452fb3642e21c SHA-1: defbcdb98c73f1d461cbaa6ead5866d55823614f SHA-256: fb972aa6cde20176dad23849d3a4259dc6c342ac97366f4a8864760dbd13b156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an effort to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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://garglob.ru/uplcv?utm_term=modulus+of+elasticity+dimensionally+equivalent+to
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bb0a5d0c---fuximigedikezapevadoz.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/b65675ae2ebe959d1a19d69719e8bf09/22933791929.pdf
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/vamubebavelujurobasis.pdf
    • http://agnieszkapawlik.com/userfiles/file/37827351390.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cb9c09fb4cf510e6e8483154ea8f263/32113324571.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/15879378926.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075fae55edb4---68440370241.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099523b08e2b---36281315558.pdf
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210618_16765C364174F3C4.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e08ede252d05d6d0184410e319df8a7/ruwunagovuvodaliparedulan.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/d321692ca8905595a4c772e32f76ac58/69366239766.pdf
    • http://sns.hu/_user/file/mopubomazekixejomuviv.pdf
    • http://nadiadsa.org/userfiles/file/82425219120.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/8c8fce19bbdb07ec0d166980eca24607/57234291823.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877d52b6adf---62028228450.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4n9qebc7j826mre6s5kt2s3auc/sibukupugosebawutu.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609193695a09c---12681118424.pdf
    • https://atpl.aero/ckfinder/userfiles/files/70400902021.pdf
    • http://www.odnpoznan.pl/fotki/file/file/50264957821.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1654cf10---mazolejamo.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/54b58aee41cdcaaac197d4a73c42b323/tupulonovivon.pdf
    • http://silesiacapital.eu/data/file/lolaxetititasexan.pdf
    • http://e1pl2.nazwa.pl/busy/fotki/file/sorasevexosu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124c4.bin
ff9f991f05f7ad78646855a447a01e61da200192e31981f192b276bdb636ac37
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 17812 bytes
font_01_sfnt_off0001540e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1540E 16792 bytes
font_02_sfnt_off00016c25.bin
2fd8afaf3e3db352b822d920b19eb6ff3ca52a5cbf014bb890c4acaf8e626adc
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C25 10956 bytes
font_03_sfnt_off00018564.bin
505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x18564 16100 bytes