Malicious PDF — malware analysis report

Static analysis result for SHA-256 e677662dc9bf3b85…

MALICIOUS

PDF

87.6 KB Created: 2021-10-08 23:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7b673298e438a161b172242cc92d3e5b SHA-1: 2bcc5470103488f46e89d65143e7479bae311b10 SHA-256: e677662dc9bf3b8501a22fd43d6179c67671edfc27b4395bd42945f7c92a6e02
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used for phishing or malware delivery. ClamAV detection and ML classification strongly suggest malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/10f7853a689ebc6194b370844186e4b4/74838066943.pdf In PDF document text
    • http://konberdbio.com/upload/files/rijexesifozumibukodalorab.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/25374518595.pdfIn PDF document text
    • https://ratodua.com/contents/files/84025212441.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/16527942071.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/2655931464.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/4400239824.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/96035244590.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/dijekeju.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/39491111600.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/mebetemoxuxaj.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ecjmnas9d3dcjlnf6iscmotpma/14141396274.pdfIn PDF document text
    • https://lerivagedesmilleetangs.com/caningest/images/file/lowumatibazuzilofete.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/legogeja.pdfIn PDF document text
    • https://gtsk.solar-napkollektor.hu/js/ckfinder/userfiles/files/26618140946.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/negiguvenodukolidunaxage.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/govatazodasinev.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/bilomedepezubadoneguzom.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/96373989177.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/gewudibume.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/53277393522.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ab9b90e782c696927c71fdae754cd2db/4901523406.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8o6mg0rpoiotbq50ni07ckevv1/39714969543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=might+be+meaning+in+tamilPDF 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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 10300 bytes
SHA-256: aa2b462e6b26c0792002139864ea134bef9c48b629273d4b6d1f2baa19bcc103
font_01_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 22816 bytes
SHA-256: 3ea127b6b8468a0ed26b59bb217a44648ec6940f6bed62e8940569e43af9a183