Malicious PDF — malware analysis report

Static analysis result for SHA-256 69100ecd07a1a103…

MALICIOUS

PDF

82.0 KB Created: 2021-08-18 19:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68aad4b0fa40c785d31ffcb371582fb1 SHA-1: f60f4398d6b6b1abbe657ef554422f95abf2f178 SHA-256: 69100ecd07a1a1037fd01882f19603699bf6a3d537017306c71cb94640007e98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm for distributing malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and link farm indicate an attempt to exploit users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://helderlive.nl/ckfinder/userfiles/files/tebubifegu.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/b40c60bdc3f75986eeefd91372e6c828/74236116537.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/74502046811.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tidukawogovaxojuzizinuk.pdfIn PDF document text
    • http://kisito.com/userfiles/file/jerimopefakamamoda.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/zifitifow.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841c3d4d791---rebevuzuni.pdfIn PDF document text
    • https://pindimana.in/uploads/file/nulatujexavidigelul.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/udvcpb4m5l88cs35l1t0jh8li0/38564187228.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874585056ea---sijudofemofikukebekamej.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ad80c56ee97---11749029158.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/beae848a9699acee207c32e0777b6c54/43751539458.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/tokugenuvepuma.pdfIn PDF document text
    • http://ibb-online.ru/f/file/70545340713.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mbcatvo1rei8emivsnq0lpcmfa/xinubigazimajerifilufaro.pdfIn PDF document text
    • https://selltoob.in/ci/userfiles/files/penulatatimepake.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/9721287666.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/kivesemokodomebokadipim.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/36935137903.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/zanoru.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e41fc54fa0---19474622162.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/gu0o8pkl3d1oippgn7pi0m5b64/buxeputanegenetegabujanat.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/betob.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d30de93cb---25637330714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mission+impossible+4+full+movie+in+hindi+download+720p+onlinePDF 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_off0000dcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 11320 bytes
SHA-256: d079bf807241ca80a9bc4d55f36362f7a466f761fc761e1ca45fc6d20a38c4ce
font_02_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 16532 bytes
SHA-256: 19ccc15c6bedc5583b19c67505ab15e68c00063bcbaa797c306b884b8279f448

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