Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec112f451b79f76…

MALICIOUS

PDF

70.7 KB Created: 2021-09-07 04:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c83a232d73b3b422878b7b08f829dba1 SHA-1: b6a4c5a487b3b381a0f5a592c927e66af425b945 SHA-256: 6ec112f451b79f76f0532a9a09587b2cd8a121c390f564d32a0555804543817f
124 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, a common tactic for phishing or distributing malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and embedded URLs indicate an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

Heuristics 5

  • 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
  • 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.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afa80e92a4a---jiteninojuwonogewajerep.pdf In PDF document text
    • http://tks-forever.com/upload/2021/08/05/file/xawinasesijowi.pdfIn PDF document text
    • http://abpaluso.com/upload/file/gamavujirukek.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/lidowadilutukeribasidugu.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725cd13343c---wusiwujinudogifodus.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/75ij5lsmo5s8gqiucfvrbc1nmi/51345425234.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/de79e9696404aaeab478d5da21201768/83413047916.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/488cdb57bf465a6eb5af73d5b6ed6b8e/33147727748.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f7b73c8dd903442981c4ea1b97bde0d0/dodekixupuwakawox.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/2756446473.pdfIn PDF document text
    • http://irths.com/upload_files/files/bolibamanilonake.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/41190964734.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/6579783312.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9021812427.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/12312974475.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a1f1a823---7445247349.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/71059928663.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4efc25e31c717975aee47cc5cc582b81/60101510476.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/99748201074.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/76151175969.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/76199661136.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fjvojt72di7vh5hh5fds4m1uv1/4952542776.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/79205674345.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4aor3okn5vhs9qieu8rpuvfg43/86669805027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=thioridazine+davis+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 17368 bytes
SHA-256: 57bc0332e6e09b428a8bc2b5f6503dba2eb03f658971779490e351b197df5807
font_01_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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