Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ce3a4ee2968336…

MALICIOUS

PDF

84.1 KB Created: 2021-06-29 16:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff68a7f40c17970852fc886ea970cbb8 SHA-1: 0c9d9e5ca7e3c6f65fecb1a6a85b6f88a8b181ac SHA-256: f3ce3a4ee29683361db8b32d405334fe97dd4a0b030e224f0bf4624182922f7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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
  • 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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e037a47bf7ea7c997d21a6d36a60b0c0/tasosinanijajujosibobedaf.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/62b3784a51913e139dbc6d63a2761e54/93713479868.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e3703a6e---71015111745.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21ce2ace5---bikono.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b61517cf1a7---72530101909.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7b1nu5mkjklp5d6tvts4cci963/wesovoxesenipugi.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/4io0ijcr875oeenoph2nmjlll1/58373773829.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ce95954a93f0d52221adb2ba80b718e0/36805387854.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881df8a0eb2---72475786844.pdf
    • http://hzjksj.com/images/upload/File/tivejanejigopizikanewis.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077360212f6b---17627459977.pdf
    • http://digemnd.com/UserFiles/file/84268258430.pdf
    • https://micsys.in/userfiles/file/20141986324.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a18972d0---bipuropevovizu.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/abd2ebbedaf250ab3a81c3369171db2a/19388896431.pdf
    • http://gsxr.hu/userfiles/file/53202870123.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/f7l2dqkr7e09fltkl2nofkoh14/guwudasagunuxetajikosuto.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/083ff12a1434b9149cb938588073f92e/8401667641.pdf
    • http://barnesfamilyre-union.com/clients/52050/File/dawovagawoxap.pdf
    • https://alatheir.com/atheirwsfiles/file/61230260988.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a238ff853ce---85189031952.pdf
    • https://nikosdimos.gr/userfiles/file/70299125110.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920338dae60---lonoxedusesera.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38c049b0c9---jakepejo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=design+with+climate+bioclimatic+approach+to+architectural+regionalism+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de83.bin
fa0de43d1901404f188dce7f141d165a0cd2c0f83e54480208528fc9d0dddbcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 11396 bytes
font_01_sfnt_off0000f8d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D5 16792 bytes
font_02_sfnt_off000110e7.bin
4092c234c06a66e791b4970c912bb44bc0107f9457fd9d86dff91e445ba5f3cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 19088 bytes