Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e06f7c356230c3…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 15:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 40135968121e7efaa46614d65e5e1d90 SHA-1: 13e83a54f490ebb18630db88076221e666455eca SHA-256: 97e06f7c356230c350d003f7430c22df860c4ffbf7572300fcdba0da4c43c75f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ackerviewguesthouse.com/userfiles/file/gagolekima.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d27c1dbb769---zoxirovekumapiga.pdfIn PDF document text
    • http://artbaget.net/admin/ckfinder/userfiles/files/sutuvixogujerurilixeweza.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/91674503010.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/47189813625.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4408b799bf---63298020081.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/dilaxelorulotupapude.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xerowimabalug.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/44769470990.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161150bd3b84d2---fovij.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/81807424577.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/10262747524.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/nagipimogegi.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/76780423069.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/63605716547.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/kuwekofuzodopivolidi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087315ab6be8---faruxowajavof.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/52594762887.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b3d0dda3a---xemawixuxobazu.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210619_42606692F5407BE1.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/j8j4s5mlum750ug0tsvsenmcs4/33173098836.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/64808350766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=cdl+general+knowledge+test+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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 18672 bytes
SHA-256: 1c5f85c2eef61fe5b1bfc227199b23f8bdca7de50b57d5b3e56b266a128863d4
font_01_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9C 10788 bytes
SHA-256: dca91d888a6488e95fcfd61ebeb8ac7f257fe57ac986a98905c37115cbf69b4d