Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb15896370ba7a1c…

MALICIOUS

PDF

80.4 KB Created: 2021-07-01 16:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 49bde8682d442bc5ff80856c2ab813d0 SHA-1: e1b8a413715fb538107f39c8d13886b14a787c4b SHA-256: eb15896370ba7a1c99c16149185ec8d09a15e5c5bda9703ce5e9b07bf182bc95
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The presence of numerous links on disposable or compromised hosting indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/982e533d74fc6cc1c779e6203c6fd967/dafoviboxilolobumidir.pdf In PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1748b8567---38514121080.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160988eab98f06---nojog.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/64a978aec4a987caecf949d264d08e93/98384706583.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/52783491019.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/birixabos.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd0587c91751943eacc322f372ed74bf/76473314398.pdfIn PDF document text
    • https://hgb.se/filer/file/46678371969.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/40975059111.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c7b7ba23a2f2c03dda9d2af1ea6c5c94/pebazukusiwizorezida.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160722e62a6f42---gewoda.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722bff2eac6---51899485332.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/38038443320.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210623_194203.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d25a271fed---xofejubodagewabijamafi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/aq663jequf611qq0bi3580nhg3/20614014818.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2a4b1e685---semosopato.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/xisunufesopo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a128f61aae---pakibopidazujuxulukirifam.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/61ce1eec316ba27ffb5ce56bcccb2708/23012283727.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/legaf.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5d9a7da93d43eef86629ac84ff6aba05/30075196695.pdfIn PDF document text
    • https://anakmeong.com/contents//files/5793081357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=function+of+digoxinPDF 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_off0000c16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16E 16160 bytes
SHA-256: 61893c6f5a4ed8be90b59e62ba5f7845fe3f782be61d2927f64273611613f2a4
font_01_sfnt_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 10220 bytes
SHA-256: 392e89f4e724e80a52d1139e0437afcae735964846b08710c3ae52d5a672f858
font_02_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 17560 bytes
SHA-256: 1b79746e4c577b023209b1c17e32acc30260cc4c86da00a27bb4ff1e1d5cd210

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