Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5b2ee9fb26b65f…

MALICIOUS

PDF

88.7 KB Created: 2021-08-09 01:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 925054ee86955916851168f30da4d27c SHA-1: 2118a3bb7651ce9173cb1d792c9bdf0746161394 SHA-256: ec5b2ee9fb26b65f8eeb26913e6b53e2fe402ee1ccc178f7d4c8f5bae3f24df1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to distribute further malicious content. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/54lr5buq9q8ftbre8tfde23kr7/93774348572.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/apfk4m7gkree2r3ipmpsdlljeq/24459592679.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac861f8de---jolunupozu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f99fd2e87---76278491706.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/62e66f9be350ec38bbd48977ce578062/82649123474.pdfIn PDF document text
    • http://naturallymine-chicago.com/clients/867610/File/busiziwebuvumenifu.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/a958e5638a589ef3404b8bf14ebecd28/barijewowilo.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a51807b17---75777566480.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/53458080466.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/627680851.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210701_190652.pdfIn PDF document text
    • https://artbynela.com/uploads/file/watezulop.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/84d2ac2b99cb91e3b6ef1c71d9cdeb54/zopimonajowesufijar.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/30424220422.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868be8e08f9---tuperibulatafuzixibeza.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcfc300fef---40520734458.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/dalutunululu.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/89227025197.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0a47b02a971711000aa6b923047c3b3c/gavaji.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/18170081284.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/terobewubomumovanodivetu.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/namevidud.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac88291bf---gokaloruzamoniwe.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/8540608144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+coordinates+can+you+find+diamonds+in+minecraftPDF 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_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 16516 bytes
SHA-256: b832a98442f12c27de73ef8724c019cfb93d5ddbcf0cf5188169748a105a951d
font_02_sfnt_off00013bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BED 10904 bytes
SHA-256: c5e0fc25a5e12343d7af3669de9c0b53f47e7b41a8da63591cf9a29a6dd46771

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