Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65e85ad4b4a62e5…

MALICIOUS

PDF

80.8 KB Created: 2021-06-30 01:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cadb40ea66b71d5e928262f470ca28f3 SHA-1: bd9e7291a94d6aaed9bddfa36c747ddefa4d4e9f SHA-256: d65e85ad4b4a62e5a98bffb37cfa3e1154b3d4884a206a5b5d6ae314fdd51a72
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to obscure the final destination of the malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607370fd529b6---meseforuxivawamudolo.pdf In PDF document text
    • http://sys-svinding.dk/userfiles/file/lonuwinek.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/64d6e6af4a003834ba7fe16a2b0d0621/gepuvukifebevidubovurugex.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/23769599124.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/77301011babcbb8cdabd262bd4f1da13/30434567152.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3b58c70b2---sepegesokebik.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/052c391f4941e56a9d997103904bd87c/41978598608.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c90fc408c9---mobit.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2f456c9d03fb474501ea7b2adfee91c9/pipunamovuzuxurovudesen.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/itij74odvvu9g77i5mv2o6tj02/77774214527.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/fh7ore867k0ddmmbutiol5nn2d/10805324355.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/85c344d97bc8eb9a833888b8fa885001/roronitugugifufap.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076943771f07---97461249722.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/demetutapitefudegoxamazaf.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f21a5c46fc0038222137a47ff8c743e2/52641693030.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0a566c13fe356432d413d7b5bb25552c/57485782732.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/kexefadugavakarod.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/h6hvq0i6jiji2ev91o2rsm6ukg/lotibulavorikomugi.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae869545745---koxeg.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/93082295824.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/042fcb0464a11bae557f50b0d6b13a6c/33453322308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+convert+dwg+to+pdf+in+autocad+2018PDF 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_off0000cd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0F 11328 bytes
SHA-256: 9de38461a4b7c1e1560fb23519a091cabf38ac588389351b78a5cb5f579d5cc4
font_01_sfnt_off0000e7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 26720 bytes
SHA-256: d48cf894cdccba847e57b53683c69b4a599ebef9e5e4b7aed6c0bf3d8227edf4
font_02_sfnt_off00011e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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