Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c587662dc18eae6…

MALICIOUS

PDF

94.6 KB Created: 2021-08-17 22:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 952d76e2dff63f2beac2c1f76ba62d34 SHA-1: 6c10ac6566c2478d9aa443f1aec03c9e4e5bea16 SHA-256: 1c587662dc18eae62dcc066cd5d1a45be7e63a3fa41aecf526a2e97c5dbde0f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0af6ef9ecfbfd0726381460a549204fc/fosozajirud.pdf
    • http://pcccmiennam.com/media/ftp/file/51542969958.pdf
    • http://tpokebar.com/uploads/files/fizulofur.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/87fc8de520efe87cac4dfd4268c9664c/goraruxerisedutojek.pdf
    • https://carrieres-pierre.com/userfiles/file/79088707425.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160adacd2d60a4---69927186023.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a468be1bcc1---leganebiduxowuvabijorivox.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/208c37b82cf02e6853d61be357efb426/janofumo.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/jofidazesokudagis.pdf
    • https://fruitssupplier.com/app/webroot/img/files/loxutoredekototekozawe.pdf
    • https://francois-daulte.com/ckfinder/userfiles/files/vijipewopavegivedipig.pdf
    • http://portalcom-b2b.es/img/user///file/_0179191001624353367.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e5347fdc98acd19017d023e1aface879/difaropulakuduwota.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/94662103125.pdf
    • https://people11people.gr/uploads/File/gokezu.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081986cb9410---78070809898.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/fonamudoxelunizarowesur.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8e5091a29---muvoradisagesenuzikide.pdf
    • http://bizbecho.com/pa/trainstation/uploads/image/file/rimawaronorab.pdf
    • http://www.icareonline.net.au/ckfinder/icare/files/98396155387.pdf
    • http://bixenony.com/userfiles/files/pamesut.pdf
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/79317090456.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/fe6654397ad5b33bd12b6867440e4c9f/jexotiwenojisata.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe0bcf70ec1---4208259810.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=abcd+2+full+movie+hindi+hd+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e38.bin
e30ea19027d0c443a31502e08a6ccbb7ad92bc64a694eb78029d92bd1bcf5f00
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E38 10620 bytes
font_01_sfnt_off00012659.bin
531666d6d73a908ea1e0e29066dac24eb47d2ca5ca441bba1026f45b08a2e81b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12659 17464 bytes
font_02_sfnt_off000153f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153F4 16792 bytes