Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a29a2686952b736…

MALICIOUS

PDF

243.9 KB Created: 2021-06-28 02:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4dc981442b39113f19629509a0adff63 SHA-1: a8a4dc3600763c7939788f27eb266797f772c730 SHA-256: 6a29a2686952b7368637fc2530649a4ab0ac7f031d08e78c4477c1c133e80200
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links pointing to compromised WordPress upload directories, suggesting it is part of a phishing campaign. The presence of urgency language further supports this, indicating the document is designed to prompt immediate user action. No scripts were extracted, but the overall structure and URL findings strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9777

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/12f4e88d448fcb32d8ede164c1f5ef0d/binonu.pdf In PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/0151e3aefa799fa3b0249edcfef937fc/nerajumodute.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/kululob.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d04576b0f4---kamaziraj.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098336ecd30d---bowerexibosasarix.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb12efa6817---maduxojetezopuwajuze.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/nelopagipamukegozidar.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/24432808235.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/retinarugokebof.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/8aa4b1615980cbb8b94fa3218f225dc5/gikasotedubisetimegutez.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac2465929---sarefelinemajud.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad0e57d494---10675821949.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/57af7569dc3f20c81bae524da47b24d8/xukavexoguw.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ac6b41e8---25158752951.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e662d16d---rawab.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/85570741676.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/55bb1b20669870eefa109841bf0da792/60331706630.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/vuwolizaxajur.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a8a9147caee22f55a7b28828f5cee472/dolefosegonoweg.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5c45d0d287079bbad81980484f70d9ec/15471448344.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/32b2dca0ef18001e1032c67167765a51/vumupekuwudiwixoweperiz.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/zinokojizuvewibadabaz.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4ebeedc8---66866682592.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/folilo.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/wuvuluxipikupekaniworakit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sai+baba+live+darshan+today+nowPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00033bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00035415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35415 10828 bytes
SHA-256: c0ebc225fb423bab3a69f4397b7d89147f1f9a1fdb97a83ca8a9390832372eab
font_02_sfnt_off00036d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D0B 24428 bytes
SHA-256: 78493797fb308d3cb9638e0411226baf4b7d2b95f73b4833e8e61b9e85c5ae18
font_03_sfnt_off0003a8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A8CA 7404 bytes
SHA-256: e298b437848619bae3066feb0cd6a416a7308c9c94690744f3225028ffea0d20