Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5d0a237f7d48c9…

MALICIOUS

PDF

79.6 KB Created: 2021-06-18 06:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 632d8186b88e081c346577fefd42dd24 SHA-1: 45ea3872d4d0a414e6a47a3fe39262bfda078d51 SHA-256: cc5d0a237f7d48c915890847ff7080554a50e3da0a5501de3d346548d072f706
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to compromised websites. The presence of multiple distinct hosts and disposable hosting suggests a phishing or malware distribution campaign.

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://infrive.ru/uplcv?utm_term=captain+america+480p PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e50dbf26---sorowupibewoguzexatozo.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/fhv1eck5g372vfo7fqj6enilb2/zikibup.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/19801199659.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/3982140701.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a8a2f080a---48951968457.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/76ae6bd7887de6d508e00128bfc99d32/xuvogumov.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ditukelatim.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5270501076---1365051252.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/zulorulizozazomajejur.pdfIn PDF document text
    • https://mvservice.it/file/kagugotutasoluxevoruvemem.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/39607818322.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/453022610.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f4f064b3---xagubofepilaf.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/73094572863.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7e40677fa---13937528523.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/eaaf0d9cfb61279c9865523d3ecc7f56/nawuzasezefatukagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 4992 bytes
SHA-256: 33da3f5f5040d5ca17ddf56fd2fe54a0c6f3b0df023345c18283d321226170c8
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 11360 bytes
SHA-256: fefe9a2322458fe4a1453059b7dff5a3ebfc9fd70360fd86f510f8907c1556f6
font_02_sfnt_off000123e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230