Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b1cc04a0889b3c…

MALICIOUS

PDF

68.6 KB Created: 2021-09-01 01:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ebdadb5671f634060c890bec789a5ef SHA-1: 5b01c0f0f08b975668762f098744c0cd97a6ef0a SHA-256: d7b1cc04a0889b3ced2a417d13da1c28f9f715272b814c418f4800d8f3976fba
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and ML classifiers, and exhibits characteristics of a password-protected archive lure. The embedded JavaScript stream and numerous external links, many pointing to compromised CMS uploads, suggest an attempt to host and distribute further malicious content. The primary goal appears to be tricking the user into providing a password to decrypt a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://asiarsolutions.com/userfiles/file/xilaneje.pdf In PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3bf6d24d---lajerawumu.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/90597382169.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/94260057656.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/29845666368.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/17708073619.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/31763e3ca3e1d9fdc85588ca00d9b906/deremusarapizojejebelufar.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/wubomorolozeraweses.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/8qe6tem65s4b3ot1g1g6erilrq/7966061260.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/tasekijadozukemid.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac93434436d---6663160579.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/disej.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/dodaveluxubux.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/78493402708.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/rtra9mhrucbsa8lfti22s8ilvu/27091859230.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1e135ba80---rogusilafemod.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607448d87837c---gekemopapap.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/97967253524.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/mabab.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/56929605147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=give+me+the+definition+of+gaslightingPDF 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_off0000af7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7E 10804 bytes
SHA-256: 849a660645c68dfbae7383f926fddbd7a178e3a3930bb38c4fc38c9fc21ca049
font_01_sfnt_off0000c811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC811 14788 bytes
SHA-256: 33c8018ac68f6518e76908364ee0ce7357236bc2b733ad35aa874afead683678
font_02_sfnt_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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