Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5ee691bbd1add0…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 08:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69634b9e9cf834883d725a190de5b7a8 SHA-1: 707182b1327ec4ab14a44a8bcf910063aab48379 SHA-256: eb5ee691bbd1add0567b3f2757ebaa1203797b68889198fe819423a6e78f6639
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of multiple external links points towards an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8fd898624---75267828583.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/85573779962.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/qg5db9ttdh8ge4danp4l9n8h7h/nowalajasofagadavax.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/6a0725b658cb514a53ee361e0aabce61/68465915693.pdf
    • http://balogmihaly.hu/UserFiles/file/texupezilufikizede.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822800cbefd---sunadeviluv.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea532b73ac---dirilupubav.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7115bbad88---53566055101.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb503a1793---tarobanogubon.pdf
    • http://rotang.net/userfiles/file/pojutisev.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bea38d1de---zurigirezuzalategimiba.pdf
    • http://okulsanmalatya.com/imgup/file/lopunukovoxaripofoselop.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3ba942e4---71778672369.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ec7173d60---32959727876.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/b7n4nmd9kmlfa5lp90dv80vbv4/fadepuxupurumumo.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/df7f1a7ea1e83886c5e231584595a99e/93021469108.pdf
    • http://alibabashipping.com/userfiles/file/puxokadalinujododegesa.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5610c68d970dd15e57440c7a4c2e0d4c/zinagexizipoxolubebafaz.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0b61c1cbcb9ccfc733b2a0ebbaf2069e/97063395595.pdf
    • http://textingrights.com/userfiles/files/10321681796.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/356e815e58373f06b5c0ea73fc86725c/xaxalupakemiv.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ajuri8d986ltitsgibksjo4nmg/kurelorodexababud.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a9c6ce8a---zivopapamanij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=excel+vba+vlookup+in+another+worksheet+with+example
    • 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_off0000f254.bin
c0149ac79cdef432f1d32c18ac665f5de38218bf85ac358df248ef5932aa65e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 17232 bytes
font_01_sfnt_off00011f37.bin
646fce9191ce6139e82fc8219e1aca7f05055550cb3e1f35b4730aa8066219c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 11208 bytes
font_02_sfnt_off0001392b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1392B 16792 bytes