Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2bdbcf953e45f6…

MALICIOUS

PDF

80.7 KB Created: 2021-06-13 01:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3ee7aee0a10e353ec5c63841acb5c97a SHA-1: 2e328faa6d563482ccecf2c39fc73ea8d0c78170 SHA-256: 4d2bdbcf953e45f62e3d94b07bf53c1a551a51a8e6d4f073ea1ea9ab15489b7c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary goal is to redirect users to malicious content.

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://allytemp.ru/uplcv?utm_term=stein+fourier+analysis+solutions PDF link annotation
    • http://desagresbrts.com/clients/34568/File/45355039041.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a5c76e9c---pogenapavawiwoxose.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/792514504cae489fe3e0c69ec49a0a70/joxonipukurazuvemarawa.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/f2b1624c9bae78551d0375d2e2ba6665/bopimexexibu.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2ef7a2b315ae3be71ef64b6b5fa02987/puneponopojitekafenotu.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/14492671715.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57ac376878---napebabenoxalepuk.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5e8427c59---73594980607.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/6kmvp1qr3tkh9i1i24fqh2jr11/92238838849.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b7d8a44d709959b30caed3f6bce60062/wipufexanakotineko.pdfIn PDF document text
    • http://candientushinko.com/images/file/46497464368.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wijuwuvepa.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/17530754017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 2856 bytes
SHA-256: 284ef71c14a8c0ded8b0c7b12ef8f655933f9bb168caa2190f9d5916b255f905
font_01_sfnt_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 4968 bytes
SHA-256: 4b1bfed5650ad41946308671b7dfb96a759cdae75cac680e75883e5c6aeead39
font_02_sfnt_off00010fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD3 11100 bytes
SHA-256: 4670013775562ea25dbb6f0faa08fcdfea3681283ff1b116588197a9ff1e5bbb

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