Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ee8ead6e04761d…

MALICIOUS

PDF

84.4 KB Created: 2021-06-30 04:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ba54cba3e98b88c474b56db75eccb42 SHA-1: cefdbc5ac4df9667a6e2e5be553200baaca8254e SHA-256: e8ee8ead6e04761d01dd2e10e1835e7098cb502de594b7457bde4641bd44aa2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as containing a link farm and external URIs, with a high ML score and ClamAV detection confirming its malicious nature. The embedded links point to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious content. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/45004143595.pdf
    • https://divinenine.net/userfiles/file/guzuvulafikeduzazonasu.pdf
    • https://communeouchamps.fr/userfiles/file/pazuzumijizukefanukadevos.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d67f7d420ac---govawazinawu.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/ba0f0cuabfcn3flaibo97l6j37/85378165807.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/cb64424d3c9990f7224268454de8e553/49100784842.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609655280d1dd---bifosekesujififapi.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/scostmqk9gmpjm9q490sorec5s/wejakumozuwudawugoruwunos.pdf
    • https://aldurra.ly/images-editeur/img/file/jajawob.pdf
    • http://cobbpaynefamilyreunion.com/clients/862770/File/mewomizoxumi.pdf
    • http://adance0112.com/upfile/editor/file/zaxikusoxomaroderit.pdf
    • http://camonetinternational.com/files/file/94015952227.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ktat5i21k7jtc6jok19hvetqs2/96723313235.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1568a5d24---90603582804.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab5387a0d5---kuxirotoselilowereb.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c757e408e90---68996236736.pdf
    • http://animationcoach.com/userfiles/file/9119329076.pdf
    • http://alarcon-v.com/editor_upload_image/file/pebet.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/1dc1b1b0dfdb8a24ce03d67fb9e0ffac/rifugejojexesofuz.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833485f0491---57531038532.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/712dc768c3e9177b92ba5c059d6d2650/37669275110.pdf
    • http://bscartridge.com/pic/ragejonitovowowiririgetas.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+hard+reset+iphone+without+screen
    • 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_off0000e746.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 16792 bytes
font_01_sfnt_off0000ff58.bin
e880ee9b7aeec55937f19d32ae0d7261b554a449de6dd6932f89479fab2f773c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 17028 bytes
font_02_sfnt_off00012bbf.bin
419296fa7d788aac20c68d59f57466b020c3a55ea5b5870307cf0634898d96fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 10740 bytes