Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c295c830dd2d4a…

MALICIOUS

PDF

71.6 KB Created: 2021-09-10 20:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1dde8283049b94a1d449fb8f5ec5377 SHA-1: b2de8215efe5043ce28061a13a55e46c602e1510 SHA-256: f9c295c830dd2d4af3f13989242cd91301a39f99d3010e7a657d5c33f27a4593
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to various domains, some of which are hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true destination or distribute malicious content. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.puskinas.lt/ckfinder/userfiles/files/pejogopek.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/g5fhnt5lv786pqnrlo03psbcl6/38499578916.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/69090763286.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/gufudagolikizowefekodeg.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/69944199801.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/27831356645.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090512471670554.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/nigofodilukalab.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16139efef90da1---sagabeduxanatunuvewi.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15010734341.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/vosamerotipasal.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/rugubofawudenulolixuxegax.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/zalikigekog.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/gemeluwoxawuju.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/13743396027.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/75894880005.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318a55af33f---73257512632.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/lewavofanipujatupoj.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/hq5oo3nf8ucs0euthuaqrlje34/92191043371.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zuruduwejuwixele.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/vajesazizodaxabimo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136f34e52cd9---9906844293.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/mobavovutizalalisaxaxa.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/fafaxesaxanagotapanugebo.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/25756350372.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/sipefuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=wps+wpa+wifi+hacker+apkPDF 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_off0000b947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 10380 bytes
SHA-256: 049bed10fbd91a5c8b505945bd3ccbc704e9319e952068a9fbb5d5958eaf63ab
font_01_sfnt_off0000d0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 15772 bytes
SHA-256: e103e9d8d8e63499749126e2ce93260c9d6cb0d499e643689475748a5cb701f6

Open this report in the interactive analyzer, or submit your own file for analysis.