Malicious PDF — malware analysis report

Static analysis result for SHA-256 5147ad22f000e7b7…

MALICIOUS

PDF

70.1 KB Created: 2021-02-18 02:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 436d56182f732a21e95489bd580f022c SHA-1: f5f0aced1b297545a5e080e896f18545fe953075 SHA-256: 5147ad22f000e7b778d5df664cc46ab7c5229afc4d2ac5b4643fd302c57f6f82
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Samsung dishwasher manual', indicating a social engineering tactic to trick users into visiting the malicious URL.

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://maypoin.ru/strik?utm_term=samsung+dishwasher+manual+dw80f600uts%252Faa PDF link annotation
    • https://cdn.sqhk.co/tutabalero/i1jdFhg/67888497044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488842/normal_5ff75c96dc0e2.pdfIn PDF document text
    • http://ranixug.iblogger.org/audition_online_ph_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/ggQ4Cjj/financial_reporting_books.pdfIn PDF document text
    • http://bejugofixo.22web.org/khadya_suraksha_patwari_report_form.pdfIn PDF document text
    • http://omerkatanalp.com/sogubumawmz0po.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_6018e89169eb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/cgdjbkw/find_words_using_really.pdfIn PDF document text
    • http://yachts-4-sale.com/just_standards_real_book_downloadgh7j4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc86d7e51deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fd9d75b50a94.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://tuvusekore.rf.gd/amharic_keyboard_for_pc.pdfIn PDF document text
    • http://tididesonorevo.rf.gd/budget_2019_malaysia_bahasa_melayu.pdfIn PDF document text
    • http://dufemeg.epizy.com/company_of_heroes_2_master_collection_vs_platinum.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/workplace_anti-_bullying_policy_template.pdfIn PDF document text
    • http://pokezuturev.rf.gd/jb_gupta_electrical_engineering_objective_book_free_download.pdfIn PDF document text
    • http://diwuvugu.epizy.com/galepajibitekuvuwavikuned.pdfIn PDF document text
    • http://dizoterimivitap.rf.gd/53318642288.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_off0000c56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56D 5816 bytes
SHA-256: 672575b3593ffc457609fe7f5d43991afc45a1498b7ed01ccd92b64bea7c45ae
font_01_sfnt_off0000d90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90A 10564 bytes
SHA-256: d556fd0f2434566ed437d93499387139d31a1b09b410ee29b4f5a2bd9688bc68
font_02_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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