Malicious PDF — malware analysis report

Static analysis result for SHA-256 40608796cf7123c7…

MALICIOUS

PDF

77.3 KB Created: 2021-02-01 07:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e217ed1201d3cd92447e42405973f490 SHA-1: 0d556612479ec8db66a354824cc1b8f49136870c SHA-256: 40608796cf7123c7aab70d35f7c786c114686842240d4a29092b560c708ee874
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's a link farm on disposable hosting, pointing to a phishing or malware distribution attempt. The embedded URL 'https://jottigo.ru/123?utm_term=in+front+of+your+nose' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=in+front+of+your+nose PDF link annotation
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/10b41aeeba.pdfIn PDF document text
    • https://torobekaxiwe.weebly.com/uploads/1/3/1/3/131380482/zekerejuzunewesirat.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/cAjhDsH/45900937210.pdfIn PDF document text
    • http://lutefofojonu.iblogger.org/91567061472.pdfIn PDF document text
    • https://tenuzovew.weebly.com/uploads/1/3/0/7/130740022/b95506.pdfIn PDF document text
    • http://kumujobu.iblogger.org/43759413488.pdfIn PDF document text
    • http://jonezuno.22web.org/instagram_template_psd_2019.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/6977452.pdfIn PDF document text
    • https://cdn.sqhk.co/dupabeket/gfV3Ajc/jekejoni.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://daguvagobilat.rf.gd/lipifakotololi.pdfIn PDF document text
    • http://sevuvev.epizy.com/email_etiquette_questions_and_answers.pdfIn PDF document text
    • http://fuvituze.epizy.com/94079139490.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/79409471484.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/herman_miller_aeron_assembly_manual.pdfIn PDF document text
    • http://tolimimagag.epizy.com/most_difficult_decision_interview_question_answer.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/free_8th_grade_math_word_problems_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 4392 bytes
SHA-256: 39638a38621fab90f73e097a6e459f7ae235421b4437ef341f9c4382cc7257d3
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 10848 bytes
SHA-256: 1b33f7aec6e85dc9b80163f0855479f8cc762074174fd4be94181dd03aeb4ea6
font_02_sfnt_off00011a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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