Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3fe749047707f7…

MALICIOUS

PDF

73.1 KB Created: 2021-08-28 01:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1db16e88c73e3478afb939e80badfb0a SHA-1: 5b9c345e023ad4cae453fa91800f3c0dafc49c74 SHA-256: 4a3fe749047707f76dda6a30851f73222083e30c49de857a68f2c56181237daf
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for malware distribution or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery, disguised as a movie download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lauraestetica.com/userfiles/files/kotojukilebofebenarobazal.pdf In PDF document text
    • https://scalper.ir/data/files/file/326551531.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/48823140314.pdfIn PDF document text
    • http://klpa.net/userData/board/file/2685836509.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ce73b19b11e---siziluvub.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fos326cj1f309idqdraq9nshpm/30808782398.pdfIn PDF document text
    • http://yoron.net/up/files/82733692380.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073e88ebc3dc---25975831484.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/kurederotonejogurezati.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7bbc6ed91---61647338778.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612384d2d32c2---koveranumoxazanedaduniw.pdfIn PDF document text
    • http://sddshchb.com/userfiles/file/Fl202108031906569450.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/13353237031.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084a40d189ad---2137361355.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/52777552545.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062009142631.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/23293957692.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3d68dc6407c2bfcef8a03b31abe19da6/24937091208.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd2531d37c---63304760169.pdfPDF link annotation
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161075f4eabe14---rumelob.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e272d6935---lufidag.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/fubivorebofagakij.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8546fca801---poweronabovorabene.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39256639518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=conjuring+3+movie+downloadPDF 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_off0000bbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC1 10912 bytes
SHA-256: 30f6991f966fb58a68d0c8bb3145795af19530fd23c484159005b7f6dd53df14
font_01_sfnt_off0000d4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C7 16432 bytes
SHA-256: 1620fda2e58db272f336cf298ac6be957059c39f7c9014d4ff7bd94ed32e26f2
font_02_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1