Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca965603fd405a7d…

MALICIOUS

PDF

88.8 KB Created: 2021-02-12 15:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 769308c86f8538f5c2aa54ae1396d5bc SHA-1: 27c0655f7fa7662c7b448562a1d54afa53809ed0 SHA-256: ca965603fd405a7dd3f908c4bf4bef6b499c0c4809732e5d7749550032d6ab47
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily garbled, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. The presence of numerous links to disposable hosting services further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=metal+slug+3+apk+full+espa%25C3%25B1ol+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499972/normal_60247c13eb425.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/f2ac88d5d.pdfIn PDF document text
    • https://lobekopaxukibo.weebly.com/uploads/1/3/1/4/131453735/juronofewirit-gubenomemefedo-mojitizu-xokofixirapu.pdfIn PDF document text
    • https://sejukato.weebly.com/uploads/1/3/4/0/134018084/7031602.pdfIn PDF document text
    • http://viwimewi.22web.org/77494323302.pdfIn PDF document text
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/fb326f9b1c.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/d1ab42dff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5fe5282cd8207.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
    • https://s3.amazonaws.com/tasufagijaremo/mixorupenevibufibub.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/gemakudopetule.pdfIn PDF document text
    • http://petetilazuji.epizy.com/9473596209.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/belgacom_tv_zenders_lijst.pdfIn PDF document text
    • http://bamalupit.rf.gd/android_tablets_for_sale_durban.pdfIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 3224 bytes
SHA-256: 063d8a4be4364e401981dc4a6b2dadb7f4b59a0dd351e2a24c739c8279cbbd7a
font_01_sfnt_off0000efd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 5484 bytes
SHA-256: cb825b7ee460032b4886d90f97d6a02f2644a3d1a072f5651a8cd5cc1a678be1
font_02_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_03_sfnt_off00010af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF6 10720 bytes
SHA-256: 8dbcd14fc7280db407e493fbb62f5e22d871bc62654b97aaf3d087bc7cbf28fc
font_04_sfnt_off00012fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC3 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_05_sfnt_off0001448a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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