Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46c0d7af950d612…

MALICIOUS

PDF

99.6 KB Created: 2021-09-05 18:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 365bd2cb82882d360a9d927280d8ff8b SHA-1: 34e0e63e6b098dbb13a28a0891c4428663b46e7d SHA-256: e46c0d7af950d612fe27ea98d6ea9519b34d5454d34038d679b1d288651f919e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pistant.ru/uplcv?utm_term=goosebumps+horrorland+pdf PDF link annotation
    • http://thaoduoconline.com/userfiles/image/file/98515088572.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/21769533552.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/19888003350.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16112e7c0452f1---19274386525.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/20922602120.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/p9apqhi2980hi8pumcvd6mgji4/87070900389.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d34caaa4e2---8598686064.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/71319005698.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/a35a8f4cbe3df395993c126abce1f55c/869143207.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f0ce8eda89b2875cda5cd0a0c8c9d1e/62450025552.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/55729137055.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/88b575b8b2f03e1187d2c41ee8ca2709/3954766086.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/14300106698.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/riwiduje.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/lalitaxew.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/96373847155.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/khi19ktjsdea48rmis7cub12m5/19577770154.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210712092723.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/9cc10875fb3e4a54302cca01aed205aa/12768275014.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fumojudip.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070699a28089---ziwoxuzaxoxirav.pdfIn PDF document text
    • http://sdes.in/uploads/vimetitubexerofebimovu.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/82944840126.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/16517861365.pdfIn PDF document text
    • 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_off00011e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0D 10852 bytes
SHA-256: 64f1de0888230c83ff078a6d033ff117aa093ca1a580ebbd1abc72ab1c9c36a4
font_01_sfnt_off000136ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AC 19492 bytes
SHA-256: 7cc54103a72d9742df8c1e00034e7ee079d5b6a61f7a8aad00f40a310de97de4
font_02_sfnt_off00016867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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