Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cab7eaa1fddaed3…

MALICIOUS

PDF

83.9 KB Created: 2021-08-14 01:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2853637f32cf5fbf33117c5b93cd625 SHA-1: 84e90abf0177fccc0b783eebb4210ebbe47e7229 SHA-256: 3cab7eaa1fddaed37acf7561117ecfa98aec295cd0c9dc58cfc29b5c46b3966c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the overall structure and URL distribution strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://www.mueblesgamez.com/ckfinder/userfiles/files/kabevadiba.pdf
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/18026874034.pdf
    • http://www.sandipmallick.com/fckimages/file/zivegurema.pdf
    • http://hkacca.com/userfiles/24539041136.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c49d173c31df1292e5c5cdae91abbe5e/xolimutatanidol.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073309b60dd8---73255592477.pdf
    • https://sealskinz.ru/files/file/51867529963.pdf
    • https://marigabung.com/contents//files/mazoxaxenodagimugakesalel.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/87j01o99vrg20mc7fod5m6rnof/sivabe.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/e5d9bdb4ffd520e0d8bdf2eb95a9bb60/21838258988.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9aa18fc1436f604014760c124da3555c/16335455129.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/s042g5ihgeh58a0nrnihpgnasv/24687662224.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607596066e20b---57623277550.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3ee589d0b27a566393db9ad3d4b14ce1/91808310572.pdf
    • http://malopolskiszlakwinny.pl/upload/File/xixevurasodisekubotenafol.pdf
    • http://aaaexpressheating.com/userfiles/file/88572097161.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/bf21c592362d1d3b9dd7397960a222c5/ladujizimunegel.pdf
    • http://np-laser.com/upload_fck/file/2021-6-14/20210614172304769564.pdf
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/salakakowopepas.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/agshai2dn5b075a4am0ompup9l/10987890187.pdf
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/begimukapekudev.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a18a3ca422b---13391696534.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a3797f797151f1ad8b9dea12965a3140/xibubeponanejo.pdf
    • https://marljivo.hr/userfiles/file/2473867938.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/vubufalami.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dded460a2---9044483043.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/luvasonox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=oraci%C3%B3n+al+esp%C3%ADritu+santo
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 16792 bytes
font_01_sfnt_off0000f8c7.bin
b079a5f84268223433aad9531c16c117c892b03e3c3aa8526a9e97b3f63a4d16
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 10692 bytes
font_02_sfnt_off00011123.bin
38a4d0c82d89c2382bcd52089c92024c29483ab95023b3bdf0ad980ef124b162
pdf-font-stream PDF embedded font (sfnt) at offset 0x11123 18300 bytes