Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb37d62ca91f4cb…

MALICIOUS

PDF

101.0 KB Created: 2021-06-28 03:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 72e8464c9a845d1a7019078df2e2f3b7 SHA-1: c203214c0393ff78b82bd785f6134580f4a0d70f SHA-256: abb37d62ca91f4cb1ca2f5025eea81cc34721fe8b26d81d5daa1bedb7eab7faa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are designed to lure users to these external sites, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b341ed85cfb---89626308299.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nq3hfe7umj3bah4r4b66hmf9q7/66432273300.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a64e301af1433b504f109a9d8d34384d/22550393603.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094a662764ff---pudozegedesizibowuwepil.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/wodolakexezugevupoba.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/mbe7756e7qc432sj6er16sobb4/vidajedogitudeluw.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/24425840075.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-7/20210607182215980086.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/n0os09blnnqs295dg97b5arnn6/64783618139.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab95218148b---84629262667.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/dokusupazol.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/32437168951.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/39886561687.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/delipukolozuw.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ba386ce2---kavulonabadamudu.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68dff4d5e4---24711530621.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/77bd69e7b86fd4ceefed935f235dd80f/66573613301.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4425e9bd7---kenokom.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/18ce682d102ec126206ff7474b645f65/41566823046.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079399504249---ximodopuvizagojazamodoba.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b260c449c5b---97958691845.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/79c8b48144ccc74f6bc5f75556982b12/lajaviloxavaditigaxupiri.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/7684256639.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/6689738cc472477751942faca4b03ac9/zigomunifutipakak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=other+planets+that+can+sustain+lifePDF 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_off00012443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C55 19204 bytes
SHA-256: 04f52e63285d4bd0a19d407f1106352881fc9fea9ba03e25241a84be4fe37db9
font_02_sfnt_off00016e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E7C 10584 bytes
SHA-256: b39ea23386d6adf3b224a8aa318d5645e6826eea452a9a5acb29466b93da85f7

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