Malicious PDF — malware analysis report

Static analysis result for SHA-256 8095314bf655e925…

MALICIOUS

PDF

99.3 KB Created: 2021-09-16 22:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 92bf1855ba5b9f9af0bc2437bc0e8e01 SHA-1: 5eeb45563a999a7a25170a01ef43b976e5b2558a SHA-256: 8095314bf655e92507336670e765e87196c0216d0920e78653e8f80c5c678db2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common method for executing malicious code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kayapaliinsaat.net/file/79391309818.pdf In PDF document text
    • http://everestlodgelukla.com/userfiles/file/sigagetavutor.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/mujozuwetibovufekexowit.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/genabaxena.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/womaravudadewatogemi.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/48753911271.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/37685126956.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/mivogavolole.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139cffe8e7c7---37898801560.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16137510e13ed7---28352299163.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/49087842407.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/mumelajuze.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/93700252669.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613defdd9f4b3---domukabaluvufiwa.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/96885611466.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/mepupinimiba.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613072f42be9c---72085514934.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/49662534548.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/15567940718.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/85117863173.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/netuviwejebegifefidepasa.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/49346887323.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/90452793089.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/f5621c62c2e2fdab19e588e9152eb8f7/rezopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=breathe+into+the+shadows+full+series+watch+onlinePDF 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_off00011855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 20828 bytes
SHA-256: 34806871ed89d76088c07c93c3abfe76a8d0da6ee0a1d97c00ba3097bbef187d
font_02_sfnt_off000166bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166BC 10812 bytes
SHA-256: 7fe41081675583daea797ed0dcf544b9349f5541884b3ea4435c3383a2fe902a

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