Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0673f734a1365b5…

MALICIOUS

PDF

86.7 KB Created: 2021-08-18 15:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16b3e0709a010b5d94bb192a35166ef2 SHA-1: 10fa996c3790f156950bd9134632f65045ce7a84 SHA-256: e0673f734a1365b5f9ef739263ed994aeb80613e3b13f026d340ab16d1331ebf
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The embedded URLs likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/fc53587e3f47777cbf8671ae620ef403/53078830598.pdf In PDF document text
    • https://0900107678.com/upload/file/2586383576.pdfIn PDF document text
    • http://esistore.be/userfiles/file/xavuwejow.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9db7243a---nobugifi.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/busixuluparuwabegolewas.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/92160749544.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/10177603904.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/67286538498.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210804193644.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/nojoxurabakovi.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/36074476118.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608075f889273---35973870745.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/4cuk9dtgj1buf5e81sjb01vpqv/fovufifonugeripigepawega.pdfIn PDF document text
    • http://henca.com/files/details/file/soxojipujumeza.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/vefawezewejogufepure.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8a272d9d8133bcf7ebcde244d65ce8f7/40902959181.pdfIn PDF document text
    • http://martonelektro.hu/files/file/96044126855.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/wedivemunisamiluv.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/83298355510.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce5abd270b---gozulis.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c7f64a619---26217791129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=avatar+cinema+telugu+lo+inglaterraPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 10552 bytes
SHA-256: 13045304354aa6625ea70399577e242fd721e2fe05f855bf9fa35a1c37d68894
font_01_sfnt_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 19328 bytes
SHA-256: f0484f7c98e9b0edcfc6dde9b2b6841021724c022d45005151403d48ee6591ae

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