Malicious PDF — malware analysis report

Static analysis result for SHA-256 206e2f5cfbb961b2…

MALICIOUS

PDF

83.9 KB Created: 2021-08-22 04:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cfe9495fcbfe9e33fc8c4515f154472a SHA-1: 2dc12038f32837ee4474c684b8a33265a1795c04 SHA-256: 206e2f5cfbb961b25bc2f3ee42b4caa2e0381b8cf61c1cbe4344d7df3efccc2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://fishuntpesca.it/file/18782666902.pdf In PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5ca6a3c5---jusini.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/46102338432d1a69f735fb0ed1394a35/pixetijusubopokilepu.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/gemozofoje.pdfIn PDF document text
    • https://sitarasign.ir/data/file/33438188492.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/11340459710.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fb617c4d4---47103833222.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/99017502970.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/b7d60b7dd31b2169d8673315eacbb4a9/wemow.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/89041026707.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161084bca163b5---63458743428.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/1229f1460a7626a2698bbd7a4e71808b/kafuxugawujitezemususi.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/busoxelezerovoz.pdfIn PDF document text
    • https://hsse.cl/files/xofatonazokudij.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/lolaxoj.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/68667638543.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/jaxasejorovav.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083d5a7b5611---toxujotemaninogakoz.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/58867400394.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/381b66b352fa7af3fc0b4cdc40e9d4ae/53288195078.pdfIn PDF document text
    • http://learningkey.org/userfiles/91323955305.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608eeeb4c285a---kisuluzabanarewunililatud.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/seh28m1anbu38k0tef38vto2n8/30603396489.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/12355486379.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/gegevixu.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/6n3e89ca20vd01djmdsvr4bl94/gizaladokete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=baldi%27s+basics+kickstarter+exclusive+demo+piratedPDF 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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 11156 bytes
SHA-256: defb9d2ec2ad95cffc11fc5a50ccc7b4a130bfc0d80ef5669c373e1970a3c886
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 16804 bytes
SHA-256: 17591cd22c0b310933e2963d18a1ff6a3f5a3c421b97e1822daa1e047e1c59c2
font_02_sfnt_off00012828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12828 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1