Malicious PDF — malware analysis report

Static analysis result for SHA-256 9726eeb2963c5aaf…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 21:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d24ce9ee9dec4a6c40e1f3c0dbef4437 SHA-1: 1dcffd9bdc57ceb003f32c832e72cf3aa1261a46 SHA-256: 9726eeb2963c5aafe98c5d4361e29000879db8ea26c348da74c8bac28099f893
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content or phish for credentials. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed for user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080acbc93859---18503685549.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/3sghi5tiahpu3746hot4d80pp1/naxenevokokider.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c1c294e7---gipis.pdf
    • http://www.allatpatikapecs.hu/images/file/tarupuregodupakutopap.pdf
    • http://hocikto.info/userfiles/file/79464306849.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/pc1ajae29g24flq0vjnr5qk9o8/napurutidudivefiwonilari.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d979ac018640ea9f117f666612716ef0/22693286451.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096042ee2de9---82549290347.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/eaebfd7442790b7c462d137d32c80ba7/4692166357.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/761sr3ir8lv0nl2plq5099fuu2/47564753205.pdf
    • https://arrayamed.com/userfiles/file/89523975794.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a665a9a9d31---22121986035.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f47178bae96fefad5a237b92c7602794/ziwogevedujetupulagid.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4hvfa4po79rqq6erofshla89hk/zofifubumotuz.pdf
    • https://permargi.com/files/galeria/files/99024631161.pdf
    • http://krevue.cz/UserFiles/File/35170472781.pdf
    • http://podiummoda.ru/userfiles/file/99340524830.pdf
    • http://terezmisszio.eu/files/file/jixunotolukowaxome.pdf
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/neromuxulejorotodozilom.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607521cba1682---21490558893.pdf
    • https://pioneerlift.com/upfiles/editor/files/16536253310.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=last+day+on+earth+helicopter+mod
    • 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_off0000e92c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 16792 bytes
font_01_sfnt_off0001013e.bin
8be618547b8b713f5ba0bd3a0401350680a0c41277985eb1138b1cdc67448577
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 17172 bytes
font_02_sfnt_off00012e63.bin
bfe6d9e53e19034895aafc99f1336f998e9a183b035ab11f08c8f0a0bc8b778f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E63 10852 bytes