Malicious PDF — malware analysis report

Static analysis result for SHA-256 2184a9d7eb2ee4d0…

MALICIOUS

PDF

72.1 KB Created: 2021-09-07 03:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 43342f789f6c455d144675c752fbda2e SHA-1: 4759363a4b731232c7b1ae77271415a9a95d97fe SHA-256: 2184a9d7eb2ee4d09223e02f1b8727f2abbf400bbcff54c690bbe2d9ebe84cd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075415d2c63e---21916940972.pdf In PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/gisorujerumuzufududip.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/57120879008.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaeeab8779---webaganupotagalureka.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6559e6320c---46122391947.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/66335990738.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160de2b39a02a6---kokige.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/pukuradogubexegowugizeju.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/xefiwuni.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/9028429785.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/zulidimitapenopu.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/13712723238.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202108140006301412.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/c8cs2shevnanu9h4ubebt9srv6/kisumure.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/98170150749.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/zejovabenotasegemajukan.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/temedugabegevenarisev.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985b05e17f4---48612501580.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/76692078330.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/736117d8e27e7f7bcf196b735e6842c0/30929427781.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/28889573912.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/mefefowem.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/sexifi.pdfIn PDF document text
    • https://tekartltd.com/upload/files/16894777202.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b610a898ea3ed6a0c634fde39a881faf/mobumopimirezemav.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2aebd499b---75878759916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=scaredy+squirrel+at+night+pdfPDF 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_off0000bb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8D 15228 bytes
SHA-256: d603fa03ef19deae548327d3994f4d16009a91cff6ad96e859d2caeae7ad12ef
font_01_sfnt_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 11216 bytes
SHA-256: f37e5100cfee0f434dbf478a75e2f3dbb5aeb71f174d18f85f96a1958181dba5
font_02_sfnt_off0000faae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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