Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdace5feaa76a148…

MALICIOUS

PDF

78.3 KB Created: 2021-09-04 03:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1a2a247aa90a634a713ab00ebc680b5a SHA-1: 8ae9f6024cfce9623f12d298468fc720338c3b77 SHA-256: cdace5feaa76a1482a4fecdcb3a7b79ba48c114f6938b2620ce086d8d59cb54f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute traffic. The presence of embedded JavaScript, flagged by heuristics, suggests potential malicious activity within the document itself, possibly to further exploit users or redirect them. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a phishing or trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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 http://fatfailogistics.com/fckeditor/files/file/netidozudusevabetirimegor.pdf In PDF document text
    • http://sanruou.com/app/webroot/uploads/files/54408622553.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/72620eae7e81b47493a1d0820c44de53/fitamijitalinowejuvoral.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/7123013242.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/naxuwofomifabuz.pdfIn PDF document text
    • https://chpcentre.com/files/file/6717597292.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/43153457938.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/39501807931.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9c844cf6c---mazodujediwik.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/jegimesegurivakemomelur.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/wawixemufeluwa.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16128134fa7729---37534179960.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/xiwalibexefamedesusi.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ff9f91ec6---90538692588.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946dffc09b1---gebewutozazonaxisiwe.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/likol.pdfIn PDF document text
    • https://aneri12.cz/res/file/46913591365.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a407c4a41ed4b455b8ee0a29a6b0eabb/2543851405.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/51972468713.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/37472734316.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8ef64ed7---gisilola.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/39943690975.pdfIn PDF document text
    • http://agrion.org/upload/fichier/14060745635.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ab42fa88---70911461921.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/cb3eab1d7298898398543705bad3eddd/pizofan.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/regobudeguruzelopurizevug.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/to5nnsrcam2hrpa9og3ot9s153/xugafexapekimitoluvif.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/77064190994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+insert+a+pdf+image+into+a+powerpoint+slidePDF 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_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 18108 bytes
SHA-256: f49436f7961fc397298ef7e95886dc3c594cd2b86d079d191457426a19c5d443
font_02_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 10920 bytes
SHA-256: b2489c1c42a0ce699eaabe183a3a99637386e154e1a842485cb7b657c63d5f69

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