Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe6f267b439751f…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 00:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4421bea1d952dd745e121ffaee01c705 SHA-1: fd429b49c86b71106a4c23df1a4911198527d28d SHA-256: 2fe6f267b439751fdac5eaca884b8323c3e48ecb1dbebe469d640b930aae97d2
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and numerous external links indicate an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hcqakegnoelelp583j8uhgh2ve/vexabo.pdf In PDF document text
    • http://alliance-ic.ru/uploads/file/kulalutojusesidokes.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607d49147e119---xefomemane.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abccfaed382---bazelakupogaz.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/42334867230.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/75134907461.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/fefefozagakukitod.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9542313f---20308825369.pdfIn PDF document text
    • http://asustainable.com/global/file/bemovepido.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/30065100400.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/xefez.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/g6lh7f8tmrpnlidon0nlndbh13/gavejifuzemewutave.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d4b6cc85a---76092692610.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/81812269778.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/3dd78cd7515f1793fb20da1a31890efd/kafazakem.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b43c52ece6e---74376441283.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/juragenabizabafo.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/80615387138.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/41842127963.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/cc4d8f03aaee487ae90d02c2641c49c3/54800173759.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/58159752582.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134fa6fe6208---fuzimumobasa.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fd992a095c1---2296243255.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/66818701328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=libros+de+amor+propio+para+mujeres+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_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 19964 bytes
SHA-256: 4f10f8f90bca788e8740db8b2779967dfa28aeb494810b466572ba26fbaffefb
font_01_sfnt_off000114eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D02 10740 bytes
SHA-256: da02c9cd14f20d724ddd4d95f5854502f6af81fe42700a4f84289ba78f912cc0