Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5aa498a5dd39f55…

MALICIOUS

PDF

62.6 KB Created: 2021-06-18 01:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bcf10c244818bcdfc1d78a17e553e3e8 SHA-1: 61e5915278929836da9505dbcaec1e4e34f8d552 SHA-256: a5aa498a5dd39f5529f1dcc6d963fab50f01accf0b00511fad5fd159a02f350a
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links to compromised websites, suggesting it's designed to host and distribute further malicious content, likely disguised as a movie download. The presence of external URIs and link farms points to a phishing or content-luring attack pattern.

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://drafthe.ru/uplcv?utm_term=veerey+ki+wedding+full+movie+watch+online PDF link annotation
    • http://coimbrasoftware.hu/images/uploads/files/31203781902.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/mugisirinogere.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38bd9d575---15797524254.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/52d339360b0877a5d96cc8b5c800ea81/poloseseg.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/c0a76145c5a5327888686b3ef00a5360/89705908472.pdfIn PDF document text
    • http://beta-rc.com/upload/files/2945120815.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bqt0tqtqgpj676uv58on41ol20/99379329422.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/tepitavub.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/61031559216.pdfIn PDF document text
    • http://kasargod.net/uploads/file/984014575.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/77107908744.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/59318514131.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/4ba1307164e135be8df8d53d9a1d615e/niganufexo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceac70a931---92399253994.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a175924de1---2496686627.pdfIn PDF document text
    • http://artospace.com/pics/file/20965472625.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69B 5540 bytes
SHA-256: 97d2157637b17d0ffd80df2aa8f5378562d411129b6114048fbda9bc97a4e6f8
font_01_sfnt_off0000c976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC976 10792 bytes
SHA-256: 2059ccedc94399ec7153812db5e9e844acb9a69b573524262bd5c5d71daaebeb

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