Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0e8ddebe49894e…

MALICIOUS

PDF

76.9 KB Created: 2021-02-16 07:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2e3c085e4a7b7914ebcaade0542366d3 SHA-1: eb140a38e6ab95fecd9049b5f80b22a56fae02d4 SHA-256: 3c0e8ddebe49894ee1782c5bb7f67a7a5b7aac9ac6774b930b4ded189aff61d9
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a prominent one pointing to 'jottigo.ru' related to catalytic converter values, suggesting a phishing or scam lure. The document body is heavily obfuscated, but the presence of external links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=how+much+is+my+scrap+catalytic+converter+worth PDF link annotation
    • https://cdn.sqhk.co/jabosuve/b8gjxz2/bebema.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/a2c46.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/gibisusup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5fed79fd675ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_600d16549aeca.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/mizap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_5fffe15590919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5ffa75bdde891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_60267815d2ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_6013ed112c66c.pdfIn PDF document text
    • https://cdn.sqhk.co/mobixipotex/cghgeia/zoom_video_calling_app_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382408/normal_5fccfc6a921d1.pdfIn PDF document text
    • https://nobobigo.weebly.com/uploads/1/3/4/4/134403715/3012615.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/nujekesi.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/che9jdr/pufijopixolutosog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5feb490903b9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366959/normal_5fc9b26d76838.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
    • http://fejivexol.epizy.com/vukovobu.pdfIn PDF document text
    • http://fupuvomevo.rf.gd/85837114713.pdfIn PDF document text
    • http://torobedi.epizy.com/pulmonary_nodule_guidelines_radiology.pdfIn PDF document text
    • http://voduvurikijo.rf.gd/75828408954.pdfIn PDF document text
    • http://tojizevujodi.rf.gd/ingersoll_weather_report_hourly.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 5272 bytes
SHA-256: 1e6bb8aff57f3eb287aabc5ac94e6037ad0ee6790d53ac04045bba0f66d4a203
font_01_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 10672 bytes
SHA-256: af8504dc7d624c9aad0dc72ad9469521a954cdc013dd7328236e84c0b27cb66f
font_02_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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