Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2d0440d4ae259a…

MALICIOUS

PDF

73.2 KB Created: 2021-03-10 05:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5f339238d7ab13d3d0c45b6462197aa6 SHA-1: 9eef45974d69c7d0fb6e32556b91588ac7f0cbe9 SHA-256: ef2d0440d4ae259a422caea435ed5ed19e09a9556190316a78e069adf2e3e0c9
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, indicating a high likelihood of malicious intent. The heuristics identify it as a link farm hosted on disposable domains, with numerous external URIs pointing to potentially malicious content. The presence of embedded URLs suggests an attempt to redirect the user to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=is+yes+please+correct PDF link annotation
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/jajeberakav.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/nozejon_dupupopotowefo_kusudatuti.pdfIn PDF document text
    • https://dirukarizudabi.weebly.com/uploads/1/3/2/3/132303081/lukiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_602bdfaaef661.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/nibegonomowu_kizebedir.pdfIn PDF document text
    • http://gosofimasuwemig.iblogger.org/7521376422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fffb05a46a34.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/83135159324.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/urobilinogen_adalah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464055/normal_5fce8bf29f313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_60104a819153b.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/xurumewenukumiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_60447999e4fb7.pdfIn PDF document text
    • https://lovebaxubifutu.weebly.com/uploads/1/3/4/3/134322000/6753e.pdfIn PDF document text
    • http://zukixulen.mypressonline.com/95516414793.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/4249035.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/realtek_audio_drivers_download_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomuper/499169543.pdfIn PDF document text
    • http://taruxapajosavup.epizy.com/33713270762.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/73915012713.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/past_tense_worksheets_grade_4.pdfIn PDF document text
    • http://nupadamemal.epizy.com/new_bhojpuri_full_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/alien_swarm_reactive_drop.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/simplifying_variable_expressions_answer_key.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 4964 bytes
SHA-256: c52a1039c8278a0dcc3140437c75db6008e0cc4d3f6877ac932ec749715063d3
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 10372 bytes
SHA-256: c94fcd7ff299b0bf023fc765af1f581a3cb189afbe81e5949bf4d61d54971f24

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