Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2a2174e97dfe71…

MALICIOUS

PDF

65.2 KB Created: 2021-06-20 06:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dba297bedcf51da4fc84371eac8ecd19 SHA-1: 6d92bae687b5088f7c122042058e0dcc2dda9d84 SHA-256: 1a2a2174e97dfe71642e519f022ef55147e27fbee2d432ab90cb22b40f565107
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 identifying it as a phishing trojan. It contains numerous external URIs and links to compromised WordPress upload directories, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed here, further supports its role as a delivery mechanism for potentially harmful 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://nomylo.ru/uplcv?utm_term=jake+and+the+neverland+pirates+porn PDF link annotation
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/aaffcbba4764c2a72ee8c227f61e1ab6/55297443610.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa21ea2c8---fijowifeke.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0ff372a9c613884af5293dacdd4ed364/48146069922.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/76fea5154c59fbf5e06b85044810789b/sosabulul.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e198e77de---jixuzafesowamisovow.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/47f6013ec9113aa5793b6bb3d933a032/vebuzilimeronoso.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/54175899678.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2028db9439d3a73359d7a44922c1b312/zafipomurabuve.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/tewawunobaleta.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/dbf33bff5f128280df14f67dcf943ebe/fegoteborenonot.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9290ed4a57---fodubevujisatirov.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6817fd21bd7a717517b2a328d7bacfc7/53019332814.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cb7fd23fe---sobowitamekuzutinixusude.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ff3e4d8969f4ab6b0133ce41079f1c13/fejonumavigopibuwa.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/60331220594.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/7069664281.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfb89a1f3e---34682860529.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_off0000c14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14E 5160 bytes
SHA-256: 24dce458659304d9c353bfebc732f49f900a100a5220051500fa685da30bec8a
font_01_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 11036 bytes
SHA-256: 72ff6db29c0c30ce1a925055baa7d751ec6e853c285dc75e3a485d3ac571cf95

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