Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a9439e9cd87a94…

MALICIOUS

PDF

81.9 KB Created: 2021-06-09 15:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d396370c48791604de861fca823e5efa SHA-1: cdf97e82259be9b1488ea955760332996004e6c1 SHA-256: a7a9439e9cd87a94884bbf13a3f50bcff5d7849cb27a7deacc346202d273f3d1
176 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document body, though heavily obfuscated, suggests a lure related to an 'iCloud activation bypass tool', indicating a phishing or scam attempt. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=icloud+activation+bypass+tool+version+1.4+download+free PDF link annotation
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/7ca9d74af4d33027d0c70dd8abd7c0a6/89827088819.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b4919c6610c---bekomekilosabotus.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/83232781557.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/41166410476.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/zavoxixisewakutusufukola.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/mamozosomavifebasinevib.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef55a8205d---116523339.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/xewuzufikoseluvasinuxa.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/nelusulapig.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c25a9ecdcfcb06bbcf5a48ba45604be5/94199048792.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/i0t1mtjk3u2mvn24hl0l1sgqpm/61310417842.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/7ba81d09cdd4093c2362a5bd1c86f781/30433870267.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b478ace12ca---37640382959.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/mugukag.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/samumikotuvufuzukivuxelam.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f7a1bb2a---13161135613.pdfPDF link annotation
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/55722817903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 5652 bytes
SHA-256: 2c75fdadf2a448456776008e6428c26a75532dd76437ab5cf62eff667f9b32de
font_01_sfnt_off0000fec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC8 11212 bytes
SHA-256: 8ccf06eec8f071053f53461b5d270db28e774f8c41cc004f954e998a60d89523
font_02_sfnt_off000124ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AE 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

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