Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2b0493c343a2e8…

MALICIOUS

PDF

135.0 KB Created: 2021-07-14 03:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: af0ab9f6ad5c82a1061c3662ff730215 SHA-1: f5e8f424ca711369c494cfc4a6aba443d023e559 SHA-256: 3d2b0493c343a2e8c9340498eb70a46ead8eab0e282d425e9636eb325c873edd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to distribute further malicious content. The presence of SEO-disposable link farms and UTM parameters indicates a tactic to improve search engine visibility for malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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.
  • 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.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81675bc7be---xipoduvagaxobaregaw.pdf In PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/hnn0h1u7nk6lnekuob4l4daars/zasesugesuzovobinawi.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/xukojupenuwobiv.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097061610e32---20916550643.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5af0e404f4---paxosaj.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/b256780ed1ebaf93beb1d70a718b0aee/56651294045.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ek1h0kr73ioak3mo1dcabel50c/jugetejagewi.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/93194a87ec7935ee27c2dd3cd2d3eb58/56084688918.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11af1669d0---bewupotawewego.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7f05afbe2255af1a03e6b33008797bc5/31827018838.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084145a93dc6---zetexojegomemom.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ava1o9qcp0nfigfl6ndj0l9lp3/vamemolif.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4015a60889---tobopajigijubofe.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e9b3761cc---lenedaduxifololaluzum.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/kobujofaletubejazo.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/hd6tsg3l8550rdqk99pglku7o0/jatazowowulamulezaxol.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/9233656448.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1c249cbd---miwobitidupapazafifege.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/20c11bf9f0f549230c9a65e87b757bbc/rezininaxugubabozijufibof.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/771970134.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/91871515851.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f6d92e0bcfb2f4afef00ffa480e734b2/juxazibose.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/tajumuzumagizo.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/77447352649.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/21829697871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=tropical+deforestation+meaningPDF 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_off0001a885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A885 21008 bytes
SHA-256: 70633fa433b28fc81f924a8c13d2706e3b4f9d54162c41d51a2c4e6fa1f625ae
font_01_sfnt_off0001dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F513 10928 bytes
SHA-256: 74610b20487bb752bd65c8f1b4d983c5570cef32eec327737647fd9f4c4cfeb1

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