Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afa381285a725fe…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 15:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74122b94943e44c7efbe11f4d649c55a SHA-1: 7aad9ce40a442aee8e59ea73021210377a77da42 SHA-256: 6afa381285a725feff3d505560181c30de4a0d4af58d4386045f2bfd6d1a09cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, highlighting the use of disposable hosting for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/002474d6587f9377e7487d60bdb24168/wuvod.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/40adee2644f9a025e2e17463ea063fa5/63574419365.pdf
    • https://ayurvedaemart.com/uploads/file/misijabofawuduvek.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6suitgcjq5ita5fp50vgj02kq1/kozofakezekevolodapegelam.pdf
    • http://ciarajewellery.com/editor_upload/file/20291350132.pdf
    • http://jr-bang.com/uploadfiles/20210624205549.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7563651ea---vezirizobefij.pdf
    • http://gocchame.vn/app/webroot/img/uploads/files/zimudivalilaxed.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc675fb99---60242440726.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608121ffd14e0---9906708547.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ffc37dd5b---14004705690.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/uo78nd1icoo32a06fvmgt3p926/nofar.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af626e49ac0---bogusagasiwilowav.pdf
    • http://jtour.vn/userfiles/file/51442574584.pdf
    • http://portalcom-b2b.es/img/user///file/_0818615001619809046.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/lkps5qe5o48stsnrav2gkdbu80/fipixoxuviwuvilasutiraz.pdf
    • http://uekekb.ru/!upload/files/21010464972.pdf
    • http://apluskleaning.com/admin/images/file/38101626765.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/1b70ed9176c8e321f840bc5d6069b560/sesuwak.pdf
    • https://vandolderskb.com/images/usr/dutukades.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/7ef15e3e11d3e0277b69368f22b06752/6521298119.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=if+i+have+dandruff+is+my+scalp+dry
    • 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_off0000f37b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 16792 bytes
font_01_sfnt_off00010b92.bin
091092e8985c873046129924b062537bffcb0c78ae958f721541c16eb5a1402b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B92 10896 bytes
font_02_sfnt_off0001248f.bin
4eaf741e3ee26348305bc718c69839fd9c17c194d755c37642a5200e7b7c0390
pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 17568 bytes