Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ee16fbfc9ef4b2…

MALICIOUS

PDF

91.7 KB Created: 2021-08-14 04:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e6244dd23e3c6f07079c1c7254fdff47 SHA-1: 9917014b085acb98c3ef3a8f8c65f8e7fc7cd28d SHA-256: 97ee16fbfc9ef4b211661a536942fb6b678e42822f62273796f5aeaaadcc67bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607af6409d4d5---82978812233.pdf In PDF document text
    • http://didaconcept.com/admin/fckeditor/file/jubelusopopu.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/29253567694.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e6eb690c---ruwizo.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b96615b76---72290555742.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd1297df40---vavadizasa.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/71792945021.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/123815239.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/kugonebaredoxirabomuwavem.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/18692560375.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/59074671505.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/pejitul.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b601dda29d1---98396014093.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/60103649346.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/wisatenonugido.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/bexajadisipozogip.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/29147374403.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ca3jv3r7ti9koqb66etkdtmi6/59883778283.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e9093a78b6c6cdefa54cbc11cd1164df/sevuponajep.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/51918313184.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/dmdtkvm21etrjdee84k1qa5evm/3293043219.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/xarerinowigiw.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/864ac5578189f238085b87ab95a414e7/xawevoka.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/vefezexoragenakitalezozon.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/orl868curj0fnlqktn5ms6pcc7/52607791872.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/oloon55a0i0m1m8oslalctu5mi/sibejazikapirijadafenovi.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/vetasudizexet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=saath+saath+1982+hindi+movie+mp3+songs+free+downloadPDF 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_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 11892 bytes
SHA-256: de5f60753aefd4c73c4267f4dcb1346aa847c3aa4d28a3cea5bc8f0f2c2f558c
font_01_sfnt_off00011cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC2 16904 bytes
SHA-256: 8ba2d205d024ffe862b0e6d7131f29aa9565d7c1cf7237d372264533526aa085
font_02_sfnt_off000148e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1