Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f81fee9b8c5c1b…

MALICIOUS

PDF

69.1 KB Created: 2021-09-05 22:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f8e21267b9e33a0180508300d0cba209 SHA-1: 0768a72b0fe2b8fd315532053bc4988bc7709b0e SHA-256: d3f81fee9b8c5c1b995690e5484a962966bccfca8fdc24aa555ea7ae84e45d16
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dhf73v9vqdiahipcvr130ucf3/poxigilizujutazaze.pdf In PDF document text
    • http://ledins.lv/cms/file/sezidivaralinaber.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161246601d9e0c---suboj.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/9e757cbb6aab214ed27c49a4e24e25db/49234783752.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/retafeziligepumi.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/24150113386.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/m7sqhp20sbkujh29fvr3qpngv7/nanogovig.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088533b2c304---79401269716.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c9be982c1b---tovatutamawefamapatenovaf.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee57efeba1b.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c5b9476efcbfe33623fb2d0543fa469c/dipesivugutukarofubasa.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/4750237350.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/o81hddggeq2jv9nobj165eo537/kofamesijulinegepuk.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a16199044---43988390500.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/kisuxerewuvi.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/sazovomo.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/612df6cf66e18a204c98bd369393c847/84671521255.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/zogewi.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/06/23/20646766382.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/92875572361.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/88927701541.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2f858836ea1d7b7a4da12d629756ad7d/93817187908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=straddle+strategy+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/jarodazikovimupezi.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_off0000b2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E4 10548 bytes
SHA-256: b52bbcc33f87505c97972b02886741c79715f9ba106b4c137e490a98e149e19a
font_01_sfnt_off0000cade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 14608 bytes
SHA-256: a10d4c2d3791882a08ed84c94e5dd038c5d583e1d56caa543727ff9b148308dc

Open this report in the interactive analyzer, or submit your own file for analysis.