Malicious PDF — malware analysis report

Static analysis result for SHA-256 0089a382bfe6c1a4…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 22:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e29a121128cfa0b77484b5bb73fadfeb SHA-1: aecbfb0452fdb56a7dc488917fcb152ae2ec2fe4 SHA-256: 0089a382bfe6c1a465cfd04151333d25150d810402ecb051e1d3aa292af8978e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous other PDF files hosted on compromised websites. This is a common technique for distributing malicious content or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://shreenatharcade.com/userfiles/file/bebedugakatenazaveramuto.pdf In PDF document text
    • https://mb-classic-service.de/userfiles/file/5544934593.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/94640349247.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2439a5f4edfc7e45f2d15c5df3a0f1e5/82172534040.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/xotizeraxafakejikabaloro.pdfIn PDF document text
    • https://olterus.net/contents/files/72419900645.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/jinifalivuvekevuvowelitog.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/raregenin.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fc6e4546c91424b1d764741cfcb4e019/87173355461.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/d9l5cja58unsriq1eoalpvc35e/55765097771.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/wofaxo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece829b80a---rosutujoburulibofatosa.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/21297458638.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/92428179028.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/46210924070.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/75735297590.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/rugowube.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/40278092165.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5f1c15a99c9cd243f2d543596915e4a9/wubowipuluxosasejapizul.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/wukobofixudawovori.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/44377385812.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/90941969765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+watch+skyfall+for+freePDF 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_off0000dc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC74 10520 bytes
SHA-256: ab7fb924a0a85e29eb9c3d776e68e1fc3d9e5e507008891fc784046629bd6d8c
font_01_sfnt_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 18016 bytes
SHA-256: a2254617a4d32870c85fe81de90e64ca93f0db1b54860b79863c5de1c2bcc624