Malicious PDF — malware analysis report

Static analysis result for SHA-256 93df8b32114ec030…

MALICIOUS

PDF

86.8 KB Created: 2021-07-25 00:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e5c001db7f7b0e537b511084bf7adf5f SHA-1: bf6b30733d09d240ae04186e7c91fb4d0d4984a9 SHA-256: 93df8b32114ec0300162372f30b150fc300513f03a7150d52a3d6f0bd6bc6c4b
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://clickkedai.com/userfiles/file/5406855527.pdf In PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5a420af31ac25ef2ca891af35e4be565/sakipuku.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/fcsk6k6k7i1ci63gl85f3fk9e1/40478866488.pdfIn PDF document text
    • https://badoza.net/userfiles/file/vadejebiwe.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/148c3cb74f6c8fab29080c6179f7eb41/84654801515.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/tabotekoru.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe065895a---85096578841.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/85185677939.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f0bb76ada---milereg.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c2efc2fc8---tuvozifawizapikuvotuzizu.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/456ak7eq9oif3j0cmqbi3qo2gi/82827092578.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/fifurefisejepajo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4cbe01539---12052301.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f09d159d8190785ee148f33c9934d36/70889563665.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ef61c641a---53072000295.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/90430886581.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/45d69af78061b750291f1d694bfb1b29/28072438679.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/nediluxevenesuwejusajiwiw.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/futafaxi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4cf07a66b---71673625960.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/26674946687.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7f099692b---69644042729.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608991c565a5c---forezuvonujuk.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/81612399437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=microelectronic+circuits+6th+edition+solution+manual+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_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 11088 bytes
SHA-256: b54b543a35433826756031edcc1fe78652d21263a30ec5ff4dbdfbddb1f9a5c9
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B12 18636 bytes
SHA-256: 463d7eadf585db5bdc33ef70978b3a7e0933948d5d266b7e1635851997e7911b