Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fd6c2648a32e84…

MALICIOUS

PDF

73.2 KB Created: 2021-06-11 04:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e17c52792a13e38b6e54ce6035c0c4 SHA-1: d4b13ef7803a37ec0ecbef0f40b0ca08a5f39a4e SHA-256: 58fd6c2648a32e846914f53cecf5150f43766f1902df940b2b9bcb8608ccdf20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML and ClamAV, indicating a high probability of malicious intent. The document contains a link farm pointing to compromised WordPress sites, likely serving as a lure for users to download further content. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=lorde+pure+heroine+full+album+download+zip
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5d9246b8ecb7a42deec8f9ce94f7773d/tokerugerukamagolu.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/kt0urcsndja2hi9bne7ljnu2f4/12677166993.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/nv2kp1hdmu4jtbrdoigh5na852/tisam.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/d3f3a31bea7be683920d51e44b3da244/jafivekibozidafepowo.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086923c5afc8---xukofuxozukabate.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/dl9pu56qvvv0edvd1teff2fvev/zikawatumer.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdee9d6a99---91237161787.pdf
    • https://airbays.com/userfiles/file/lenafujebetuxi.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160842e252aafa---27577530237.pdf
    • https://reniuved.it/file/32713536227.pdf
    • http://promocode.lu/userfiles/files/83645768766.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39a6a427ea---givinixupimib.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160720352aceb4---tojeveveketegugiru.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/0f3c1ba0c271ea0edc2763697646ee25/nirazupeselig.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a5694081e2b---82079216069.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/27cbf53de016b1e55f67eff0e7409b01/nusofivivi.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a689e9cc7ed---sokobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db55.bin
fa1da9755d3c2256a7f059b156492791050169d0b4b2cd94a119a4890f218723		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 5324 bytes
font_01_sfnt_off0000ed63.bin
a0e27891f2dc253735f32eb480cda682e8c6fb7a215386ff9e566c9eb316289d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 12740 bytes

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