Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e2fca4ac9e03a…

MALICIOUS

PDF

84.5 KB Created: 2021-07-05 20:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c9065e97a0c39c2ff8ae1d1b93a1de89 SHA-1: 80e7488eadd149098e126c9e175e5e5a4de28ba2 SHA-256: ed7e2fca4ac9e03afd97044f2b43fc8e1fedf662664b23b3516fed385b2a4a8d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links to compromised websites, suggesting an attempt to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports this phishing-like lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • 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 http://school19-zav.ru/userfiles/file/laxezeroralomisidu.pdf In PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ba31a62ba5f---ponuvajijovu.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1044653d0---98310155780.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/59071753231.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/mawoberize.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/fktbjmeqvctqv17ldcvhteo380/xalovukefujutitedamisopi.pdfIn PDF document text
    • http://deauville.ru/files/file/wigajowelejin.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/51627956256.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/762243b06945dab58fee92eb805b8dc5/warofowazirunimo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762fb986cf7---34691088785.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/h7aq0c1qtq41csmmg24ourp7af/9367617134.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d7776056e---vofopexugadusiranute.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b0576f3d2---loxumazeje.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/57853929515.pdfIn PDF document text
    • https://mytopics.it/uploads/file/92394696373.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/h53m0rvpsao8po8mog2qclqhl5/79307729671.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/e527s26u5jdmpj6pg0l61m0iol/90259843308.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/xesagutege.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/kijajadebelotaju.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/samagilisejap.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/rakufavinodurasalupo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de881c810a---5235078900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=clash+of+lights+new+updatePDF 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_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 17208 bytes
SHA-256: 34f9196577cbf91c799753bab3b47af6680c4698b021480f4ab7df8c33181ab8
font_02_sfnt_off00012bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 10896 bytes
SHA-256: d0bcf3eaf118fb4fc7974d062551e739c73e829a730337e245c6c4a5576ef924

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