Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acced771d739791…

MALICIOUS

PDF

94.7 KB Created: 2021-07-30 05:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9f716bcfdd125457db16fad2dbc585d SHA-1: 0fed943a4d26fc858ebe181a606a2a458d71803e SHA-256: 6acced771d7397912c8584e6144c9f77dbbbed895758be5efd1aa9c51afae433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports the classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://spreewaldatelier.de/img/editor/file/fozorox.pdf In PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/wowopakovebimibibuxexuvar.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/29526324094.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa8f4cc73a---91677604708.pdfIn PDF document text
    • http://airetechservices.com/userfiles/files/jusomosovo.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/34186286541.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/58120645472.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/7pgg4d9faptl4em9j47o2g1304/81747553638.pdfIn PDF document text
    • http://weingut-suppan.at/files/mezewonixutuwupegu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ac248903---25381359068.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d27d3843100---mefigedikote.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0c6fc7a324640af6c7eccbf526f3a27b/99754276310.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/xunuvugowiwumu.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/dfb9f31aba98549d25dfd0eef298e284/favezesepumodorof.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796cf4a5173---32371312588.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbab76c1b9---budofabatiruxogujomut.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/12906184130.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/sarozomevevekabudub.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/82122503195.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a319d0f988---valifogaxupebaxinogo.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f57ec2bb679---96583451033.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160721bdc153bc---zabifugixupejuwugev.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/vesorepekepur.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3ce4c5c77dcf51d037ce704e4c9ce438/50526421054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=hasta+el+ultimo+hombre+pelicula+completa+en+espa%C3%B1ol+latino+gratis+megaPDF 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_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 11260 bytes
SHA-256: cecf46ded90a61a262adbb992d260414626f2531329a611b8746e450b03252df
font_01_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B3 16128 bytes
SHA-256: f6296b9fec31e3d34ffd7c4afaeaa6ea16d5a9477eeb27d9c8144cfa754799e8
font_03_sfnt_off00013926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13926 18312 bytes
SHA-256: 35b158fd7494159610f2bdfd557f7b203b56380fb386465636d957604f2ae5de

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